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\(C^{n}\)-Diffeomorphism [6206]
\(C^n\) Differentiable Function [6254]
\(n\) times Continuously Differentiable Functions [6205]
A defining property of the field of real numbers [6194]
Absolute Value of Complex Numbers [1247]
Absolute Value of Integers [1080]
Absolute Value of Rational Numbers [1081]
Absolute Value of Real Numbers [583]
Absolutely Convergent Complex Series [1725]
Absolutely Convergent Series [198]
Accumulation Points [174]
Addition of Complex Numbers [1657]
Addition of Ideals [1068]
Adjacency List Representation [1215]
Adjacency Matrix [1213]
Affine Basis, Affine Coordinate System [434]
Affine Space [6277]
Affine Subspace [414]
Affinely Dependent and Affinely Independent Points [6280]
Algebra Homomorphism [6235]
Algebra over a Ring [6213]
Algebraic Element [6255]
Algorithm [1777]
Algorithm Solving a Problem [1778]
Aliquant Part [2323]
Alphabet, Letter, Concatenation, String, Empty String, Formal Language [708]
Alternate Ratio [1951]
Alternating Multilinear Map [6338]
Altitude of a Triangle [923]
Angle Between Faces [2220]
Angle in a Circular Segment [1855]
Angle, Rectilinear, Vertex, Legs [650]
Area of Rectangle, Rectangle Contained by Adjacent Sides [1014]
Atomic Formulae in Predicate Logic [6226]
Automorphism [432]
Average Velocity [6309]
Axis of a Cone [2228]
Axis of a Cylinder [2231]
Axis of a Sphere [2224]
Banach Space [6264]
Base of a Cone [2229]
Bases of a Cylinder [2232]
Bernoulli Experiment [1812]
Biconnected Graphs, \(k\)-Connected Graphs [1227]
Big O Notation [1087]
Bijective Function [771]
Bilinear Form [6229]
Binary Operation [6188]
Binomial Coefficients [993]
Bipartite Graph [1236]
Boolean Algebra of Propositional Logic [187]
Boolean Terms, Variables and Connectors [1307]
Boundary [907]
Boundary Point, Boundary [1202]
Bounded Affine Set [6293]
Bounded and Unbounded Functions [302]
Bounded Complex Sequences [1714]
Bounded Real Sequences, Upper and Lower Bounds for a Real Sequence [1136]
Bounded Subsets of Real Numbers [584]
Cancellation Property [837]
Cancellative Semigroups [1102]
Canonical Projection of an Equivalence Relation [6330]
Canonical Representation of Positive Integers [803]
Canonical Representation of Positive Rational Numbers [804]
Cartesian Product [748]
Cauchy Sequence [1072]
Center of a Sphere [2225]
Certain and Impossible Event [183]
Characteristic of a Ring [881]
Chord and Secant [1012]
Chords Equally Distant From the Center and at Greater Distance From the Center [1854]
Circle, Circumference, Diameter, Radius, Semicircle [690]
Circles Touching One Another [1851]
Circular Sector [2360]
Circular Segment [1852]
Classification of Differential Equations
First-Order Ordinary Differential Equation (ODE) [247]
Clopen Set [853]
Closed Curve [1211]
Closed Walks, Closed Trails, and Cycles [1165]
Co-prime (Relatively Prime) Numbers [1288]
Collinear Points [649]
Combinations [209]
Commensurable Segments [1095]
Commutative (Abelian) Group [553]
Commutative (Unit) Ring [880]
Commutative Monoid [706]
Commutative Semigroup [1103]
Comparing Cardinal Numbers [984]
Complete Ordered Field [6193]
Complex Cauchy Sequence [1250]
Complex Conjugate [1245]
Complex Infinite Series [1724]
Complex Polynomials [252]
Complex Sequence [1249]
Composition of a Ratio [1953]
Composition of Relations [1309]
Computational Problem - a Formal Definition [1776]
Concentric Circles [2784]
Conclusion (Conditional), Antecedent, Consequent [1304]
Conditional Probability [428]
Cone [2227]
Congruence [2781]
Congruent Circles [1850]
Conjunction [712]
Connected and Disconnected Graphs, Bridges and Cutvertices [1166]
Connected Vertices [1223]
Constant Function [6342]
Constant Function Real Case [1371]
Continuous Complex Functions [251]
Continuous Functions at Single Complex Numbers [1742]
Continuous Functions at Single Real Numbers [219]
Continuous Functions in Metric Spaces [1205]
Continuous Random Variables [225]
Continuous Real Functions [1260]
Contradiction, Invalid Boolean Function [1321]
Contrapositive [1306]
Convergent Complex Sequence [1700]
Convergent Complex Series [147]
Convergent Rational Sequence [1572]
Convergent Real Sequence [141]
Convergent Sequences and Limits [148]
Convergent Series [175]
Conversion of a Ratio [1955]
Convex Affine Set [6287]
Convex Hull [6292]
Corresponding Magnitudes [1950]
Cosets [827]
Cosine of a Real Variable [1745]
Cotangent Bundle [6332]
Countable Set [772]
Cube Number [2327]
Cube, Hexahedron [2234]
Curves In the Multidimensional Space \(\mathbb R^n\) [1208]
Cut in Extreme and Mean Ratio [1985]
Cyclic Group [807]
Cylinder [2230]
Definition of Complex Numbers [216]
Definition of Continuity Using Open Sets [6195]
Derivative of an n-Dimensional Curve [6247]
Derivative, Differentiable Functions [1370]
Diagonal [908]
Diameter of a Sphere [2226]
Difference Quotient [1369]
Differentiable Manifold, Atlas [6207]
Differential Form of Degree k [6335]
Digraph, Initial and Terminal Vertices, Loops, Parallel and Inverse Edges, Simple Digraph [524]
Dimension of a Vector Space [1041]
Dimension of an Affine Space [6281]
Direct Sum of Vector Spaces [6320]
Directional Derivative [256]
Discrete Random Variables [182]
Disjunction [713]
Divergent Sequences [1332]
Divergent Series [217]
Divisibility of Ideals [1065]
Divisor, Complementary Divisor [700]
Dodecahedron [2237]
Domain of Discourse [6219]
Dot Product of Complex Numbers [1246]
Dot Product, Inner Product, Scalar Product (Complex Case) [6266]
Dot Product, Inner Product, Scalar Product (General Field Case) [1049]
Duplicate Ratio [1948]
Eigenvalue [6250]
Eigenvector [6339]
Ellipse [6300]
Embedding, Inclusion Map [6241]
Equal Solid Figures [2219]
Equality, Inequality [1539]
Equipotent Sets [978]
Equivalence Relation, Equivalent Classes, Partitions, Representative Elements, Quotient Sets [574]
Equivalence [1305]
Euclidean Affine Space [6278]
Euclidean Movement - Isometry [2777]
Euler's Constant [1344]
Even and Odd Complex Functions [352]
Even and Odd Functions [416]
Even Number [2317]
Even-Times Even Number [2319]
Even-Times Odd Number [2320]
Exponential Function of General Base [1603]
Exponentiation [673]
Exterior Algebra, Alternating Product, Universal Alternating Map [6333]
Exterior, Interior, Alternate and Corresponding Angles [910]
Face of a Three-Dimensional Polyhedron [2211]
Falling And Rising Factorial Powers [1399]
Field [557]
Field Extension [6211]
Field Homomorphism [559]
Fifth Binomial [2089]
Finite and Sigma-Finite Measure [6237]
Finite and Sigma-Finite Pre-measure [6238]
Finite Field Extension [6228]
Finite Set, Infinite Set [985]
First Apotome [2091]
First Binomial [2085]
First Order Predicate Logic [186]
Floors and Ceilings [280]
Fourth Apotome [2094]
Fourth Binomial [2088]
Frame of Reference [6294]
Function, Arity and Constant [6222]
Generalized Polynomial Function [6337]
Generating Systems [279]
Geometric Probability [1801]
Gnomon [2776]
GOTO Command, GOTO Program, Index [1182]
GOTO-Computable Functions [1197]
Greatest Common Divisor [1280]
Group [671]
Group Homomorphism [679]
Group Operation [6253]
Groupoid (Magma) [836]
Harmonic Series [237]
Hausdorff Space [6199]
Having a Greater Ratio [1946]
Having the Same Ratio, Directly Proportional [1945]
Height of a Figure [1986]
Higher Order Directional Derivative [6204]
Hilbert Space [6265]
Homeomorphism, Homeomorphic Spaces [6197]
Homogeneous and Inhomogeneous Linear Equations with \(n\) Unknowns [1043]
Homogeneous and Inhomogeneous Systems of Linear Equations with \(n\) Unknowns [1044]
Homomorphism [401]
Icosahedron [2236]
Ideal [1062]
Identity Matrix [1051]
Identity, Neutral Element, Left Identity, Right Identity [661]
Incidence, Adjacency, Neighbours [525]
Incidence, Adjacency, Predecessor and Successor Vertices, Neighbours [544]
Inclination of a Plane to a Plane [2215]
Inclination of a Straight Line to a Plane [2214]
Independent Events [395]
Index Set, Family of Sets [6198]
Inertial and Noninertial Frames of Reference [6295]
Infimum [1755]
Injective Function [769]
Inscribing and Circumscribing Rectilineal Figures [1919]
Inscribing Circles in Rectilineal Figures, Circumscribing Rectilineal Figures about Circles [1921]
Inscribing Rectilineal Figures in Circles, Circumscribing Circles about Rectilineal Figures [1920]
Instantaneous Velocity [6310]
Integral Closure [6322]
Integral Element [6258]
Interlacing Pieces with Respect to a Cycle, Interlacement Graph [1235]
International System of Units (SI)
Meter [6274]
Second [6273]
Intersections of Lines [644]
Intersections of Surfaces [648]
Inverse Ratio [1952]
Invertible and Inverse Matrix [1055]
Invertible Functions, Inverse Functions [407]
Irreducible, Prime [822]
Irreflexive, Asymmetric and Antisymmetric Relation [575]
Isometry [2778]
Isomorphic Digraphs [1178]
Isomorphic Semigroups [838]
Isomorphic Undirected Graphs [1177]
Isomorphism [412]
Jordan Arc (Simple Curve) [1210]
Laplace Experiments and Elementary Events [973]
Limit of a Function [6203]
Limit Ordinal [780]
Line, Curve [636]
Linear Combination [1035]
Linear Function [1377]
Linear Map [403]
Linear Order [6191]
Linear Span [1037]
Linearly Dependent and Linearly Independent Vectors, Zero Vector [1036]
Linked List, List Nodes [1214]
LOOP Command, LOOP Program [1180]
LOOP-Computable Functions [1183]
Magnitudes Commensurable and Incommensurable in Square [2082]
Manifold [6200]
Matrix Multiplication [1050]
Matrix, Set of Matrices over a Field [1048]
Maximal Ideal [6243]
Measurable Set [6230]
Measurable Space [6239]
Measure [6232]
Measureable Function [6231]
Metric (Distance) [614]
Metric Space [617]
Minimal Polynomial [6321]
Module [6233]
Modulo Operation, Modulus [1283]
Monic Polynomial [6257]
Monoid [659]
Monotonic Functions [282]
Monotonic Sequences [1155]
Multilinear Map [6319]
Multiple of Aliquot Part [2316]
Multiple, Number Multiplying another Number [1275]
Multiplication of Complex Numbers [1668]
Multiplication of Natural Numbers [876]
Multiplicative System [6234]
Mutually Disjoint Sets [6227]
Mutually Exclusive and Collectively Exhaustive Events [859]
Mutually Independent Events [1808]
Negation [714]
Norm, Normed Vector Space [846]
Normal Subgroups [273]
Number [2315]
Number of Distinct Divisors [702]
Obtuse and Acute Angle [689]
Octahedron [2235]
Odd Number [2318]
Odd-Times Odd Number [2321]
Open Ball, Neighborhood [849]
Open Cover [150]
Open Function, Closed Function [6242]
Open Set, Closed Set [852]
Order Relation [6190]
Order Relation for Integers - Positive and Negative Integers [1075]
Order Relation for Natural Numbers [697]
Order Relation for Rational Numbers - Positive and Negative Rational Numbers [1076]
Order Relation for Real Numbers - Positive and Negative Real Numbers [1107]
Order Relation for Step Functions [1758]
Ordered Field [6192]
Ordered Pair, n-Tuple [747]
Ordinal Number [723]
Pairwise Independent Events [1809]
Parallel Planes [2217]
Parallel Straight Lines [788]
Parallelogram - Defining Property IV [940]
Partial Maps (Functions) [123]
Perfect Number [2330]
Permutations [188]
Perturbed Ratio [1957]
Pieces of a Graph With Respect to A Cycle [1231]
Plan at Right Angles to a Plane [2213]
Planar Drawing (Embedding) [1212]
Planar Graph [1226]
Plane [647]
Plane Figure, Interior, Exterior, Sides [687]
Plane Number [2324]
Point [631]
Point of Division, Point of External Division [1013]
Points, Lines, Planes, Hyperplanes [6282]
Pointwise and Uniform Convergence [173]
Polynomial over a Ring, Degree, Variable [487]
Polynomial Ring [6323]
Polynomials [199]
Positive and Negative Numbers [585]
Pre-measure [6236]
Predicate [6223]
Preorder (Quasiorder), Partial and Total Order, Poset and Chain [576]
Prime Ideal [6240]
Prime Numbers, Composite Numbers [704]
Principal Ideal [1063]
Principal Ideal Domain [6340]
Principal Ideal Ring [1064]
Prism [2222]
Probability and its Axioms [858]
Probability Distribution [1815]
Probability Mass Function [1824]
Proper and Trivial Divisors [703]
Properties of Relations Between Two Sets [1308]
Proportion in Three Terms [1947]
Proportional Numbers [2328]
Pyramid, Tetrahedron [2221]
Quantifier, Bound Variables, Free Variables [6221]
Random Experiments and Random Events [857]
Random Variable, Realization, Population and Sample [1813]
Ratio ex Aequali [1956]
Ratio, Having a Ratio [1943]
Rational and Irrational Magnitudes [2083]
Rational and Irrational Magnitudes in Square [2084]
Rational Cauchy Sequence [1485]
Rational Sequence [1484]
Real Cauchy Sequence [1704]
Real Infinite Series, Partial Sums [1109]
Real Intervals [1153]
Real Sequence [875]
Rearrangement of Infinite Series [1363]
Reciprocially Related Figures [1984]
Rectilineal Figure Inscribed in Another Rectilineal Figure [1918]
Recursive Definition of the Determinant [6252]
Reflexive, Symmetric and Transitive Relation [572]
Relation [571]
Relative and Absolute Frequency [1837]
Relatively Composite Numbers [2322]
Restriction [1170]
Riemann Integrable Functions [1763]
Riemann Sum With Respect to a Partition [1781]
Right Angle, Perpendicular Straight Lines [653]
Right Inverse [6325]
Ring [683]
Ring Homomorphism [885]
Ring of Integers [6324]
Ring of Sets (measure-theoretic definition) [6216]
Second Apotome [2092]
Second Binomial [2086]
Section over a Base Space [6334]
Sematics, Proposition [710]
Semigroup [660]
Separating and Non-Separating Cycles [1232]
Separation of a Ratio [1954]
Sequence [874]
Sequences Tending To Infinity [1345]
Set of Binary Logical Values (True and False) [707]
Set of Natural Numbers (Peano) [664]
Set-theoretic Definition of Order Relation for Natural Numbers [719]
Set-theoretic Definitions of Natural Numbers [718]
Set, Set Element, Empty Set [550]
Sigma-Algebra [6212]
Signature [6224]
Similar Cells [2218]
Similar Cones, Similar Cylinders [2233]
Similar Plane and Solid Numbers [2329]
Similar Rectilineal Figures [1983]
Similarity [2782]
Similarly Inclined Planes [2216]
Simplex [6286]
Sine of a Real Variable [1746]
Sixth Binomial [2090]
Solid Figures, Three-Dimensional Polyhedra [2210]
Solid Number [2325]
Solution of Ordinary DE [6341]
Spacetime Diagram [6307]
Spectrum of a Commutative Ring [6245]
Sphere [2223]
Square Matrix [1056]
Square Number [2326]
Square, Rectangle, Rhombus, Rhomboid, Trapezium [909]
Step Functions [1751]
Stirling Numbers of the First Kind [1004]
Straight Line at Right Angles To a Plane [2212]
Straight Line, Segment and Ray [645]
Subdigraphs and Superdigraphs; Induced Subdigraph [1171]
Subfield [887]
Subgraphs and Supergraphs; Induced Subgraph [390]
Subgroup [554]
Submonoid [6210]
Subring [884]
Subsequence [1151]
Subset, Superset, Union, Intersection, Set Difference, Set Complement, Power Set [552]
Subspace [562]
Subtraction of Complex Numbers [1701]
Subtraction of Integers [1585]
Subtraction of Rational Numbers [1586]
Subtraction of Real Numbers [1588]
Sum of Angles [651]
Sums [261]
Supplemental Angles [652]
Suppressing Vertices, Suppressed Multigraph [1169]
Supremum [1754]
Surface [646]
Surjective Function [770]
Symmetric Bilinear Form [6336]
Symmetric Matrix [1779]
Syntax [709]
Tangent Bundle [6326]
Tangent to the Circle [1853]
Tautology, Valid Boolean Functions [1318]
Terms in Predicate Logic [6225]
Third Apotome [2093]
Third Binomial [2087]
Topological Chart [6201]
Topological Space, Topology [6189]
Total Maps (Functions) [592]
Totally Differentiable Functions, Total Derivative [6215]
Transcendental Element [6256]
Transition Map [6202]
Transitive Set [720]
Transposed Matrix [1054]
Trees and Forests [96]
Triangle, Right Triangle and Other Types of Triangles [688]
Triplicate Ratio [1949]
Undirected Graph, Vertices, Edges, Order, Simple Graph [523]
Unit [2314]
Unit and Unit Group, Zero Divisor and Integral Domain [821]
Unit-Cost Random Access Machine [1179]
Unitary Affine Space [6279]
Upper and Lower Triangular Matrix [1053]
Variable [6220]
Vector Field [222]
Vector Space, Vector, Vector Addition, Skalar Multiplication [560]
Vector Spaces
Basis, Coordinate System [299]
Vertex Degrees for Digraphs [1172]
Vertex Degrees for Undirected Graphs [362]
Walks, Trails, and Paths [1164]
Weakly and Strongly Connected Digraphs [1219]
WHILE Command, WHILE Program [1181]
WHILE-Computable Functions [1184]
Zariski Topology of a Commutative Ring [6246]
Zero (Absorbing, Annihilating) Element, Left Zero, Right Zero [662]
Zero Matrix [1052]
Zero Ring [879]
(Real) Exponential Function Is Always Positive [1419]
\(-(-x)=x\) [522]
\(-(x+y)=-x-y\) [535]
\(-0=0\). [499]
\((-x)(-y)=xy\) [531]
\((-x)y=-(xy)\) [530]
\((x^{-1})^{-1}=x\) [534]
\((xy)^{-1}=x^{-1}y^{-1}\) [536]
\(\epsilon\)-\(\delta\) Definition of Continuity [1254]
\(\exp(0)=1\) [1423]
\(\exp(0)=1\) (Complex Case) [1739]
\(0x=0\) [521]
\(1^{-1}=1\). [500]
\(b\)-Adic Fractions [1110]
\(b\)-Adic Fractions Are Real Cauchy Sequences [1111]
A Criterion for Isosceles Triangles [749]
A General Criterion for the Convergence of Infinite Series [1148]
A Necessary and a Sufficient Condition for Riemann Integrable Functions [1764]
A Necessary But Not Sufficient Condition For Convergence Of Infinite Series [1264]
A product of two real numbers is zero if and only if at least one of these numbers is zero. [528]
A proposition cannot be both, true and false [1322]
A proposition cannot be equivalent to its negation [1323]
A Sufficient Condition for Riemann Integrable Functions [1766]
A Sufficient Condition for Riemann Integrable Functions II [1767]
Addition and Scalar Multiplication of Riemann Upper and Lower Integrals [1770]
Addition of Complex Numbers Is Associative [1658]
Addition of Complex Numbers Is Commutative [1660]
Addition of Integers [890]
Addition of Integers Is Associative [1443]
Addition of Integers Is Cancellative [1462]
Addition of Integers Is Commutative [1460]
Addition Of Natural Numbers [842]
Addition Of Natural Numbers Is Associative [1428]
Addition of Natural Numbers Is Cancellative [1432]
Addition of Natural Numbers Is Cancellative With Respect To Inequalities [1551]
Addition of Natural Numbers Is Commutative [1430]
Addition of Rational Cauchy Sequences [1486]
Addition of Rational Cauchy Sequences Is Associative [1494]
Addition of Rational Cauchy Sequences Is Cancellative [1569]
Addition of Rational Cauchy Sequences Is Commutative [1496]
Addition Of Rational Numbers [1446]
Addition of Rational Numbers Is Associative [1447]
Addition of Rational Numbers Is Cancellative [1471]
Addition of Rational Numbers Is Commutative [1469]
Addition of Real Numbers [1514]
Addition Of Real Numbers Is Associative [31]
Addition of Real Numbers Is Cancellative [1574]
Addition Of Real Numbers Is Commutative [33]
Algebraic Structure of Complex Numbers Together with Addition [1666]
Algebraic Structure of Complex Numbers Together with Addition and Multiplication [1690]
Algebraic Structure of Integers Together with Addition [1654]
Algebraic Structure of Integers Together with Addition and Multiplication [892]
Algebraic Structure Of Natural Numbers Together With Addition [841]
Algebraic Structure Of Natural Numbers Together With Multiplication [877]
Algebraic Structure of Non-Zero Complex Numbers Together with Multiplication [1688]
Algebraic Structure of Non-Zero Rational Numbers Together with Multiplication [1646]
Algebraic Structure of Non-Zero Real Numbers Together with Multiplication [1640]
Algebraic Structure of Rational Numbers Together with Addition [1645]
Algebraic Structure of Rational Numbers Together with Addition and Multiplication [1647]
Algebraic Structure of Real Numbers Together with Addition [1639]
Algebraic Structure of Real Numbers Together with Addition and Multiplication [1638]
All Convergent Real Sequences Are Cauchy Sequences [1394]
Alternate Ratios of Equal Fractions [2339]
Alternate Ratios of Multiples [2345]
Alternating Sum of Binomial Coefficients [1407]
Angle Bisector Theorem [1989]
Angles and Sides in a Triangle I [791]
Angles and Sides in a Triangle II [793]
Angles and Sides in a Triangle III [899]
Angles and Sides in a Triangle IV [901]
Angles and Sides in a Triangle V [903]
Angles at Intersections of Straight Lines [763]
Angles in Circles have Same Ratio as Arcs [2019]
Angles in Same Segment of Circle are Equal [1901]
Angles made by Chord with Tangent‎ [1912]
Angles of a Right And Isosceles Triangle [926]
Angles of Right Triangle [930]
Angles on Equal Arcs are Equal [1907]
Any Positive Characteristic Is a Prime Number [882]
Apotome is Irrational [2167]
Apotome not same with Binomial Straight Line [2205]
Area contained by Apotome and Binomial Straight Line Commensurable with Terms of Apotome and in same Ratio [2208]
Area of Square on Greater Segment of Straight Line cut in Extreme and Mean Ratio [2295]
Area of Square on Lesser Segment of Straight Line cut in Extreme and Mean Ratio [2297]
Area of Squares on Whole and Lesser Segment of Straight Line cut in Extreme and Mean Ratio [2298]
Areas of Circles are as Squares on Diameters [2278]
Areas of Similar Polygons Inscribed in Circles are as Squares on Diameters [2277]
Areas of Triangles and Parallelograms Proportional to Base [1987]
Barycentric Coordinates, Barycenter [6283]
Basic Rules of Manipulating Finite Sums [1114]
Basis Arithmetic Operations Involving Differentiable Functions, Product Rule, Quotient Rule [1375]
Bayes' Theorem [464]
Bernoulli's Inequality [590]
Between two Cubes exist two Mean Proportionals [2031]
Between two Similar Plane Numbers exists one Mean Proportional [2037]
Between two Similar Solid Numbers exist two Mean Proportionals [2038]
Between two Squares exists one Mean Proportional [2030]
Binomial Distribution [450]
Binomial is Irrational [2130]
Binomial Straight Line is Divisible into Terms Uniquely [2136]
Binomial Theorem [1397]
Bisected Chord of a Circle Passes The Center [1060]
Bisecting a Segment [757]
Bisecting an Angle [755]
Bisection of Arc [1910]
Bisectors of Two Supplemental Angles Are Right Angle To Each Other [766]
Boolean Function [1316]
Calculating the Number of Distinct Positive Divisors [1302]
Calculating with Complex Conjugates [1251]
Calculation Rules for General Powers [1628]
Calculation Rules for the Big O Notation [1167]
Cancellation Law [823]
Cardinal Number [980]
Cauchy Product of Absolutely Convergent Complex Series [1736]
Cauchy Product of Absolutely Convergent Series [1390]
Cauchy Product of Convergent Series Is Not Necessarily Convergent [1392]
Characteristic String [1001]
Characterization of Biconnected Planar Graphs [1237]
Characterization of Cutvertices [1238]
Characterization of Independent Events [1804]
Characterization of Independent Events II [1806]
Chord Lies Inside its Circle [1061]
Chords do not Bisect Each Other [1866]
Circles Touch at One Point at Most [1893]
Circumscribing about Circle Triangle Equiangular with Given [1927]
Circumscribing Circle about Regular Pentagon [1938]
Circumscribing Circle about Square [1933]
Circumscribing Circle about Triangle [1929]
Circumscribing Regular Pentagon about Circle [1936]
Circumscribing Square about Circle [1931]
Closed Formula For Binomial Coefficients [1400]
Combining Rays to Straight Lines [767]
Commensurability is Transitive Relation [2106]
Commensurability of Elements of Proportional Magnitudes [2105]
Commensurability of Squares [2103]
Commensurability of Squares on Proportional Straight Lines [2108]
Commensurability of Sum of Commensurable Magnitudes [2109]
Commensurable Magnitudes are Incommensurable with Same Magnitude [2107]
Common Section of Bisecting Planes of Cube Bisect and are Bisected by Diagonal of Cube [2275]
Common Section of Planes Perpendicular to other Plane is Perpendicular to that Plane [2256]
Common Section of Two Planes is Straight Line [2240]
Common Sections of Parallel Planes with other Plane are Parallel [2253]
Commutative Group of Multiplicative Functions [506]
Commutativity of the Greatest Common Divisor [1287]
Comparing Natural Numbers Using the Concept of Addition [1547]
Comparison of Sides of Five Platonic Figures [2312]
Complementary Segments of Parallelograms [959]
Completeness Principle For Complex Numbers [1709]
Completeness Principle For Real Numbers [1108]
Complex Cauchy Sequences Vs. Real Cauchy Sequences [1705]
Complex Conjugate of Complex Exponential Function [1747]
Complex Exponential Function [312]
Complex Numbers are a Field Extension of Real Numbers [1243]
Complex Numbers are Two-Dimensional and the Complex Numbers \(1\) and Imaginary Unit \(i\) Form Their Basis [1698]
Complex Numbers as a Vector Space Over the Field of Real Numbers [1694]
Composition of Continuous Functions at a Single Point [1606]
Composition of Relations (Sometimes) Preserves Their Left-Total Property [1312]
Composition of Relations Preserves Their Right-Uniqueness Property [1310]
Composition of Total Functions [1314]
Compositions of Continuous Functions on a Whole Domain [1608]
Condition for Commensurability of Roots of Quadratic Equation [2111]
Condition for Equal Angles contained by Elevated Straight Lines from Plane Angles [2272]
Condition for Existence of Fourth Number Proportional to Three Numbers [2065]
Condition for Existence of Third Number Proportional to Two Numbers [2064]
Condition for Incommensurability of Roots of Quadratic Equation [2112]
Condition for Point to be Center of Circle [1889]
Conditions for Diameter to be Perpendicular Bisector [1865]
Cones or Cylinders are Equal iff Bases are Reciprocally Proportional to Heights [2291]
Conjunction
Commutativity of Conjunction [1834]
Connection between Quotient, Remainder, Modulo and Floor Function [1284]
Connectivity Is an Equivalence Relation - Components Are a Partition of a Graph [1221]
Constructing a Parallel Line from a Line and a Point [921]
Constructing a Perpendicular Segment to a Straight Line From a Given Point Not On the Straight Line [760]
Constructing a Perpendicular Segment to a Straight Line From a Given Point On the Stright Line [759]
Constructing a Segment Equal to an Arbitrary Segment [732]
Constructing an Angle Equal to an Arbitrary Rectilinear Angle [897]
Constructing an Equilateral Triangle [693]
Constructing the Golden Ratio of a Segment [1025]
Construction of a Light Clock [6275]
Construction of a Square II [1028]
Construction of a Square on a given Segment [965]
Construction of Apotome is Unique [2173]
Construction of Circle from Segment [1905]
Construction of Components of First Bimedial [2121]
Construction of Components of Major [2127]
Construction of Components of Second Bimedial [2122]
Construction of Components of Side of Rational plus Medial Area [2128]
Construction of Components of Side of Sum of Medial Areas [2129]
Construction of Cube within Given Sphere [2309]
Construction of Equilateral Polygon with Even Number of Sides in Outer of Concentric Circles [2292]
Construction of Fields from Integral Domains [888]
Construction of Fifth Apotome [2183]
Construction of Fifth Binomial Straight Line [2146]
Construction of Figure Similar to One and Equal to Another [2011]
Construction of First Apotome [2179]
Construction of First Apotome of Medial is Unique [2174]
Construction of First Binomial Straight Line [2142]
Construction of Fourth Apotome [2182]
Construction of Fourth Binomial Straight Line [2145]
Construction of Fourth Proportional Straight Line [1998]
Construction of Geometric Progression in Lowest Terms [2021]
Construction of Golden Section [2016]
Construction of Groups from Commutative and Cancellative Semigroups [839]
Construction of Incommensurable Lines [2104]
Construction of Isosceles Triangle whose Base Angle is Twice Apex [1934]
Construction of Mean Proportional‎ [1999]
Construction of Medial Straight Lines Commensurable in Square Only containing Medial Rectangle whose Square Differences Commensura [2126]
Construction of Medial Straight Lines Commensurable in Square Only containing Rational Rectangle whose Square Differences Commensu [2125]
Construction of Minor is Unique [2176]
Construction of Parallelepiped Similar to Given Parallelepiped [2264]
Construction of Parallelogram Equal to Given Figure Exceeding a Parallelogram [2015]
Construction of Parallelogram Equal to Given Figure Less a Parallelogram [2014]
Construction of Parallelograms I [957]
Construction of Parallelograms II [961]
Construction of Parallelograms III [963]
Construction of Part of Line [1995]
Construction of Polyhedron in Outer of Concentric Spheres [2293]
Construction of Rational Straight Lines Commensurable in Square Only whose Square Differences Commensurable with Greater [2123]
Construction of Rational Straight Lines Commensurable in Square Only whose Square Differences Incommensurable with Greater [2124]
Construction of Regular Dodecahedron within Given Sphere [2311]
Construction of Regular Icosahedron within Given Sphere [2310]
Construction of Regular Octahedron within Given Sphere [2308]
Construction of Regular Tetrahedron within Given Sphere [2307]
Construction of Second Apotome [2180]
Construction of Second Apotome of Medial is Unique [2175]
Construction of Second Binomial Straight Line [2143]
Construction of Segment on Given Circle Admitting Given Angle [1914]
Construction of Segment on Given Line Admitting Given Angle [1913]
Construction of Sequence of Numbers with Given Ratios [2023]
Construction of Similar Polygon [2004]
Construction of Similarly Cut Straight Line [1996]
Construction of Sixth Apotome [2184]
Construction of Sixth Binomial Straight Line [2147]
Construction of Solid Angle equal to Given Solid Angle [2263]
Construction of Solid Angle from Three Plane Angles any Two of which are Greater than Other Angle [2372]
Construction of Straight Line Perpendicular to Plane from point not on Plane [2248]
Construction of Straight Line Perpendicular to Plane from point on Plane [2249]
Construction of Tangent from Point to Circle [1897]
Construction of that which produces Medial Whole with Medial Area is Unique [2178]
Construction of that which produces Medial Whole with Rational Area is Unique [2177]
Construction of Third Apotome [2181]
Construction of Third Binomial Straight Line [2144]
Construction of Third Proportional Straight Line‎ [1997]
Construction of Triangles From Arbitrary Segments [895]
Continuity of Complex Exponential Function [1743]
Continuity of Cosine and Sine [1782]
Continuity of Exponential Function [1422]
Continuity of Exponential Function of General Base [1610]
Contraposition of Cancellative Law for Adding Integers [1561]
Contraposition of Cancellative Law for Adding Natural Numbers [1545]
Contraposition of Cancellative Law for Adding Rational Numbers [1565]
Contraposition of Cancellative Law for Adding Real Numbers [1578]
Contraposition of Cancellative Law for Multiplying Integers [1563]
Contraposition of Cancellative Law for Multiplying Natural Numbers [1559]
Contraposition of Cancellative Law for Multiplying Rational Numbers [1567]
Contraposition of Cancellative Law of for Multiplying Real Numbers [1580]
Convergence Behavior of the Sequence \((b^n)\) [1347]
Convergence Behaviour of Absolutely Convergent Series [1268]
Convergence of Alternating Harmonic Series [1367]
Convergence of Complex Conjugate Sequence [1707]
Convergence of Infinite Series with Non-Negative Terms [1158]
Convergent Complex Sequences Are Bounded [1716]
Convergent Complex Sequences Vs. Convergent Real Sequences [1702]
Convergent Rational Sequences With Limit \(0\) Are a Subgroup of Rational Cauchy Sequences With Respect To Addition [1522]
Convergent Rational Sequences With Limit \(0\) Are an Ideal Of the Ring of Rational Cauchy Sequences [1524]
Convergent Rational Sequences With Limit \(0\) Are Rational Cauchy Sequences [1516]
Convergent Sequences are Bounded [1137]
Convergent Sequences are Cauchy Sequences [1073]
Convergent Sequences
Criteria [307]
Convergent Series
A General Criterion for the Convergence of Infinite Complex Series [308]
Converse of Area of Square on Greater Segment of Straight Line cut in Extreme and Mean Ratio [2296]
Converse of Tangent Secant Theorem [1917]
Coprime Numbers form Fraction in Lowest Terms [2351]
Corollaries From the Group Axioms [555]
Counting the Set's Elements Using Its Partition [982]
Criteria for Subgroups [811]
Criterion for Alternating Infinite Series [1266]
Cube Number multiplied by Cube Number is Cube [2050]
Cutting a Segment at a Given Size [736]
Cyclic Groups are Abelian [813]
Definition of Integers [844]
Definition of Rational Numbers [1033]
Definition of Real Numbers [1105]
Definition of the Metric Space \(\mathbb R^n\), Euclidean Norm [1206]
Derivative of a Constant Function [1372]
Derivative of a Linear Function \(ax+b\) [1378]
Diagonals of a Rectangle [941]
Diagonals of a Rhombus [942]
Difference of Convergent Complex Sequences [1713]
Difference of Convergent Real Sequences [1133]
Differentiable Functions are Continuous [1374]
Direct Comparison Test For Absolutely Convergent Complex Series (Majorant Criterion) [1727]
Direct Comparison Test For Absolutely Convergent Series (Majorant Criterion) [1270]
Direct Comparison Test For Divergence Series [1335]
Discovery of Irrational Numbers [1096]
Disjunction
Commutativity of Disjunction [1835]
Distance in Normed Vector Spaces [847]
Distributivity Law for Complex Numbers [1678]
Distributivity Law For Integers [1466]
Distributivity Law For Natural Numbers [1030]
Distributivity Law For Rational Cauchy Sequences [1506]
Distributivity Law For Rational Numbers [1491]
Distributivity Law For Real Numbers [520]
Divergence of Harmonic Series [1333]
Divisibility Laws [508]
Divisibility of Elements of Geometric Progression from One where First Element is Prime [2059]
Divisibility of Principal Ideals [1066]
Division with Quotient and Remainder [818]
Divisor is Reciprocal of Divisor of Integer [2368]
Divisor of One of Coprime Numbers is Coprime to Other [2353]
Divisors obey Distributive Law [2335]
Divisors of a Product Of Many Factors, Co-Prime to All But One Factor, Divide This Factor [1295]
Divisors of a Product Of Two Factors, Co-Prime to One Factor Divide the Other Factor [1293]
Divisors of Integers [1273]
Double Summation [549]
Elements of Geometric Progression between Coprime Numbers [2028]
Elements of Geometric Progression from One Divisible by Prime [2058]
Elements of Geometric Progression from One where First Element is not Power of Number [2056]
Elements of Geometric Progression from One where First Element is Power of Number [2055]
Elements of Geometric Progression from One which are Powers of Number [2054]
Elements of Geometric Progression from One which Divide Later Elements [2057]
Equal Angles in Equal Circles [1906]
Equal Arcs of Circles Subtended by Equal Straight Lines [1909]
Equal Chords in Circle [1894]
Equality of Ratios Ex Aequali [1979]
Equality of Ratios in Perturbed Proportion [1980]
Equality of Ratios is Transitive [1968]
Equiangular Triangles are Similar [1990]
Equilateral Pentagon is Equiangular if Three Angles are Equal [2301]
Equivalence of Set Inclusion and Element Inclusion of Ordinals [730]
Equivalence
Commutativity of Equivalence [1836]
Equivalency of Vectors in Vector Space If their Difference Forms a Subspace [6328]
Equivalent Definitions of Trees [1242]
Equivalent Statements Regarding Parallel Lines [917]
Estimate for the Remainder Term of Complex Exponential Function [1732]
Estimate for the Remainder Term of Exponential Function [1361]
Euclidean Lemma [805]
Euclidean Sum of Geometric Progression [2371]
Euler's Formula [1783]
Even Number minus Even Number is Even [2069]
Even Number minus Odd Number is Odd [2070]
Even Number of Vertices with an Odd Degree in Finite Digraphs [568]
Even Number of Vertices with an Odd Degree in Finite Graphs [1175]
Eveness of the Cosine of a Real Variable [1790]
Every Bounded Real Sequence Has a Convergent Subsequence [1152]
Every Contraposition is a Tautology [1328]
Every Distance Is Positive Definite [615]
Every Equilateral Triangle Is Equiangular. [742]
Every Natural Number Is Greater or Equal Zero [1556]
Every Proposition Implies Itself [1319]
Every uniformly convergent sequence of functions is pointwise convergent. [1256]
Existence of Arbitrarily Small Positive Rational Numbers [1846]
Existence of Arbitrarily Small Powers [1350]
Existence of Complex One (Neutral Element of Multiplication of Complex Numbers) [1673]
Existence of Complex Zero (Neutral Element of Addition of Complex Numbers) [1662]
Existence of Fraction of Number Smaller than Given Number [2095]
Existence of Integer One (Neutral Element of Multiplication of Integers) [1454]
Existence of Integer Zero (Neutral Element of Addition of Integers) [1452]
Existence of Integers Exceeding Real Numbers [1342]
Existence of Inverse Complex Numbers With Respect to Addition [1664]
Existence of Inverse Complex Numbers With Respect to Multiplication [1675]
Existence of Inverse Integers With Respect to Addition [1511]
Existence of Inverse Rational Cauchy Sequences With Respect to Addition [1508]
Existence of Inverse Rational Numbers With Respect to Addition [1509]
Existence of Inverse Rational Numbers With Respect to Multiplication [1649]
Existence of Inverse Real Numbers With Respect to Addition [35]
Existence of Inverse Real Numbers With Respect to Multiplication [42]
Existence of Lowest Common Multiple [2364]
Existence of Natural Numbers Exceeding Positive Real Numbers [1340]
Existence of Natural One (Neutral Element of Multiplication of Natural Numbers) [1457]
Existence of Natural Zero (Neutral Element of Addition of Natural Numbers) [1455]
Existence of Parallel Straight Lines [786]
Existence of Powers Exceeding Any Positive Constant [1348]
Existence of Prime Divisors [798]
Existence of Rational Cauchy Sequence of Ones (Neutral Element of Multiplication of Rational Cauchy Sequences) [1504]
Existence of Rational Cauchy Sequence of Zeros (Neutral Element of Addition of Rational Cauchy Sequences) [1498]
Existence of Rational One (Neutral Element of Multiplication of Rational Numbers) [1482]
Existence of Rational Zero (Neutral Element of Addition of Rational Numbers) [1473]
Existence of Real One (Neutral Element of Multiplication of Real Numbers) [40]
Existence of Real Zero (Neutral Element of Addition of Real Numbers) [34]
Exponential Function [281]
Exponential Function Is Strictly Monotonically Increasing [1594]
Exponential Function of General Base With Integer Exponents [1620]
Exponential Function of General Base With Natural Exponents [1616]
Extracting the Real and the Imaginary Part of a Complex Number [1248]
Extremities of Line Segments containing three Plane Angles any Two of which are Greater than Other form Triangle [2259]
Factor Groups [191]
Factor Rings [274]
Factorial [1005]
Factorials and Stirling Numbers of the First Kind [1007]
Fiber of Maximal Ideals [6318]
Fiber of Prime Ideals [6317]
Fiber of Prime Ideals Under a Spectrum Function [6261]
Finding the Centre of a given Circle [1058]
Finite Basis Theorem [1042]
Finite Cardinal Numbers and Set Operations [988]
First Apotome of Medial is Irrational [2168]
First Bimedial is Irrational [2131]
First Bimedial Straight Line is Divisible Uniquely [2137]
First Element of Geometric Progression not dividing Second [2025]
First Element of Geometric Progression that divides Last also divides Second [2026]
First Law of Planetary Motion [6304]
Fitting Chord Into Circle [1925]
Five Platonic Solids [2313]
Four Straight Lines are Proportional iff Similar Parallelepipeds formed on them are Proportional [2274]
From Medial Straight Line arises Infinite Number of Irrational Straight Lines [2209]
Functional Equation of the Complex Exponential Function [1735]
Functional Equation of the Exponential Function [1415]
Functional Equation of the Exponential Function of General Base [1612]
Functional Equation of the Exponential Function of General Base (Revised) [1630]
Functional Equation of the Natural Logarithm [1601]
Fundamental Lemma of Homogeneous Systems of Linear Equations [1045]
Fundamental Theorem of Arithmetic [800]
General Associative Law of Multiplication [541]
General Associative Law [540]
General Commutative Law of Multiplication [543]
General Commutative Law [542]
General Powers of Positive Numbers [1626]
Generalized Euclidean Lemma [1298]
Generating Co-Prime Numbers Knowing the Greatest Common Divisor [1289]
Generating the Greatest Common Divisor Knowing Co-Prime Numbers [1291]
Geometric Distribution [429]
Geometric Progression in Lowest Terms has Coprime Extremes [2022]
Geometric Progression with Coprime Extremes is in Lowest Terms [2020]
Geometric Progressions in Proportion have Same Number of Elements [2027]
Greatest Common Divisor and Least Common Multiple of Ideals [1069]
Greatest Common Divisor of Three Numbers [2333]
Greatest Common Divisor of Two Numbers - Euclidean Algorithm [2370]
Greatest Common Divisors Of Integers and Prime Numbers [1296]
Greatest Common Measure of Commensurable Magnitudes [2097]
Greatest Common Measure of Three Commensurable Magnitudes [2098]
Group Homomorphisms and Normal Subgroups [832]
Group Homomorphisms with Cyclic Groups [815]
Handshaking Lemma for Finite Digraphs [565]
Handshaking Lemma for Finite Graphs [1173]
How Convergence Preserves the Order Relation of Sequence Members [1144]
How Convergence Preserves Upper and Lower Bounds For Sequence Members [1145]
How the Boundary Changes the Property of a Set of Being Open [1203]
If First of Four Numbers in Geometric Progression is Cube then Fourth is Cube [2042]
If First of Three Numbers in Geometric Progression is Square then Third is Square [2041]
If Ratio of Cube to Number is as between Two Cubes then Number is Cube [2044]
If Ratio of Square to Number is as between Two Squares then Number is Square [2043]
Imaginary Unit [1160]
Incommensurability of Sum of Incommensurable Magnitudes [2110]
Incommensurable Magnitudes do not Terminate in Euclidean Algorithm [2096]
Incommensurable Magnitudes Have Irrational Ratio [2101]
Indefinite Integral, Antiderivative [1768]
Inequality of Natural Numbers and Their Successors [1540]
Inequality of the Artithmetic Mean [589]
Infinite Geometric Series [1353]
Infinite Number of Primes [507]
Inscribed Angle Theorem [1900]
Inscribing Circle in Regular Pentagon [1937]
Inscribing Circle in Square [1932]
Inscribing Circle in Triangle [1928]
Inscribing in Circle Triangle Equiangular with Given [1926]
Inscribing Regular 15-gon in Circle [1940]
Inscribing Regular Pentagon in Circle [1935]
Inscribing Square in Circle [1930]
Integer Coprime to all Factors is Coprime to Whole [2354]
Integer Divided by Divisor is Integer [2367]
Intermediate Value Theorem [1259]
Intersecting Chord Theorem [1915]
Intersecting Circles have Different Centers [1867]
Intersection of Convex Affine Sets [6289]
Invertible Functions on Real Intervals [1381]
Isometry is Injective [2779]
Isosceles Triagles I [740]
Isosceles Triagles II [743]
It is true that something can be (either) true or false [1320]
Kernel and Image of a Group Homomorphism are Subgroups [833]
Kernel and Image of Group Homomorphism [809]
Last Element of Geometric Progression with Coprime Extremes has no Integer Proportional as First to Second [2063]
Law of Cosines (for Acute Angles) [1027]
Law of Cosines (for Obtuse Angles) [1026]
Law of Total Probability [449]
Least Common Multiple [1276]
Least Common Multiple Divides Common Multiple [2365]
Least Common Multiple of Three Numbers [2366]
Least Number with Three Given Fractions [2369]
Least Ratio of Numbers [2363]
Limit of N-th Roots [1624]
Line at Right Angles to Diameter of Circle At its Ends Touches the Circle [1896]
Line Joining Centers of Two Circles Touching Externally [1892]
Line Joining Centers of Two Circles Touching Internally [1891]
Line joining Points on Parallel Lines is in Same Plane [2244]
Line Parallel to Perpendicular Line to Plane is Perpendicular to Same Plane [2245]
Line Perpendicular to Two Intersecting Lines is Perpendicular to their Plane [2241]
Linear Independence of the Imaginary Unit \(i\) and the Complex Number \(1\) [1696]
Linearity and Monotony of the Riemann Integral [1769]
Linearity and Monotony of the Riemann Integral for Step Functions [1759]
Lines Parallel to Same Line not in Same Plane are Parallel to each other [2246]
LOOP-Computable Functions are Total [1185]
Magnitude of Divisors [1278]
Magnitudes Proportional Compounded are Proportional Separated [1974]
Magnitudes Proportional Separated are Proportional Compounded [1975]
Magnitudes with Irrational Ratio are Incommensurable [2102]
Magnitudes with Rational Ratio are Commensurable [2100]
Magnitudes with Same Ratios are Equal [1966]
Major is Irrational [2133]
Major Straight Line is Divisible Uniquely [2139]
Mean Value Theorem For Riemann Integrals [1772]
Medial Area not greater than Medial Area by Rational Area [2120]
Medial is Irrational [2115]
Metric Spaces and Empty Sets are Clopen [854]
Metric Spaces are Hausdorff Spaces [850]
Minor is Irrational [2170]
Monotone Convergence [197]
Monotonically Increasing Property of Probability Distributions [1816]
Multinomial Coefficient [1819]
Multinomial Distribution [481]
Multinomial Theorem [1822]
Multiples of Alternate Ratios of Equal Fractions [2340]
Multiples of Divisors obey Distributive Law [2336]
Multiples of Ratios of Numbers [2347]
Multiples of Terms in Equal Ratios [1961]
Multiplication of Complex Numbers Is Associative [1669]
Multiplication of Complex Numbers Is Commutative [1671]
Multiplication of Integers [891]
Multiplication of Integers Is Associative [1450]
Multiplication of Integers Is Cancellative [1464]
Multiplication of Integers Is Commutative [1448]
Multiplication of Natural Numbers Is Associative [1434]
Multiplication of Natural Numbers Is Cancellative [1440]
Multiplication of Natural Numbers Is Cancellative With Respect to the Order Relation [1583]
Multiplication of Natural Numbers is Commutative [1435]
Multiplication of Numbers is Associative [1960]
Multiplication of Numbers is Left Distributive over Addition [1958]
Multiplication of Numbers is Right Distributive over Addition [1959]
Multiplication Of Rational Cauchy Sequences [1488]
Multiplication of Rational Cauchy Sequences Is Associative [1500]
Multiplication of Rational Cauchy Sequences Is Cancellative [1571]
Multiplication of Rational Cauchy Sequences Is Commutative [1502]
Multiplication Of Rational Numbers [1475]
Multiplication of Rational Numbers Is Associative [1476]
Multiplication Of Rational Numbers Is Cancellative [1480]
Multiplication Of Rational Numbers Is Commutative [1478]
Multiplication of Real Numbers [1532]
Multiplication of Real Numbers Is Associative [37]
Multiplication of Real Numbers Is Cancellative [1575]
Multiplication of Real Numbers Is Commutative [38]
Multiplication of Real Numbers is Left Distributive over Subtraction [1962]
Multiplication of Real Numbers is Right Distributive over Subtraction‎ [1963]
Multiplying Negative and Positive Integers [1589]
Multiplying Negative and Positive Rational Numbers [1596]
Multiplying Negative and Positive Real Numbers [1598]
Natural Logarithm [1421]
Natural Number Divisor or Multiple of Divisor of Another [2334]
Natural Number is Prime or has Prime Factor [2362]
Natural Number Multiplication is Commutative [2346]
Not all Cauchy sequences converge in the set of rational numbers. [1092]
Nth Powers [1618]
Nth Roots of Positive Numbers [46]
Number divides Number iff Cube divides Cube [2034]
Number divides Number iff Square divides Square [2033]
Number does not divide Number iff Cube does not divide Cube [2036]
Number does not divide Number iff Square does not divide Square [2035]
Number multiplied by Cube Number making Cube is itself Cube [2051]
Number neither whose Half is Odd nor Power of Two is both Even-Times Even and Even-Times Odd [2079]
Number of Relations on a Finite Set [580]
Number of Strings With a Fixed Length Over an Alphabet with k Letters [996]
Number of Subsets of a Finite Set [998]
Number Squared making Cube is itself Cube [2052]
Number whose Half is Odd is Even-Times Odd [2078]
Numbers are Coprime iff Sum is Coprime to Both [2358]
Numbers between which exist two Mean Proportionals are Similar Solid [2040]
Numbers between which exists one Mean Proportional are Similar Plane [2039]
Numbers forming Fraction in Lowest Terms are Coprime [2352]
Numbers whose Product is Square are Similar Plane Numbers [2048]
Odd Divisor of Even Number also divides its Half [2075]
Odd Number Coprime to Number is also Coprime to its Double [2076]
Odd Number minus Even Number is Odd [2072]
Odd Number minus Odd Number is Even [2071]
Odd Number multiplied by Even Number is Even [2073]
Odd Number multiplied by Odd Number is Odd [2074]
Oddness of the Sine of a Real Variable [1792]
One-to-one Correspondence of Ideals in the Factor Ring and a Commutative Ring [6248]
Open and Closed Subsets of a Zariski Topology [6262]
Opposite Angles of Cyclic Quadrilateral [1902]
Opposite Angles on Intersecting Straight Lines [782]
Opposite Planes of Solid contained by Parallel Planes are Equal Parallelograms [2261]
Opposite Sides and Opposite Angles of Parallelograms [933]
Order of Cyclic Group [808]
Order of Subgroup Divides Order of Finite Group [831]
Order Relation for Natural Numbers, Revised [1555]
Ordinals Are Downward Closed [727]
Parallel Equal Segments Determine a Parallelogram [931]
Parallel Line in Triangle Cuts Sides Proportionally [1988]
Parallel Lines I [911]
Parallel Lines II [913]
Parallel Lines III [915]
Parallelepiped cut by Plane Parallel to Opposite Planes [2262]
Parallelepiped cut by Plane through Diagonals of Opposite Planes is Bisected [2265]
Parallelepiped formed from Three Proportional Lines equal to Equilateral Parallelepiped with Equal Angles to it formed on Mean [2273]
Parallelepipeds are of Equal Volume iff Bases are in Reciprocal Proportion to Heights [2271]
Parallelepipeds of Same Height have Volume Proportional to Bases [2269]
Parallelepipeds on Equal Bases and Same Height are Equal in Volume [2268]
Parallelepipeds on Same Base and Same Height whose Extremities are not on Same Lines are Equal in Volume [2267]
Parallelepipeds on Same Base and Same Height whose Extremities are on Same Lines are Equal in Volume [2266]
Parallelogram - Defining Property II [938]
Parallelogram - Defining Property I [937]
Parallelogram Similar and in Same Angle has Same Diameter [2012]
Parallelograms About Diameter are Similar [2010]
Parallelograms and Triagles [955]
Parallelograms on Equal Bases and on the Same Parallels [945]
Parallelograms On the Same Base and On the Same Parallels [943]
Perpendicular in Right-Angled Triangle makes two Similar Triangles [1994]
Plane through Straight Line Perpendicular to other Plane is Perpendicular to that Plane [2255]
Planes Perpendicular to same Straight Line are Parallel [2251]
Planes through Parallel Pairs of Meeting Lines are Parallel [2252]
Position of Minus Sign in Rational Numbers Representations [1592]
Power of Two is Even-Times Even Only [2077]
Powers of Coprime Numbers are Coprime [2357]
Powers of Elements of Geometric Progression are in Geometric Progression [2032]
Preservation of Continuity with Arithmetic Operations on Continuous Functions [1261]
Preservation of Continuity with Arithmetic Operations on Continuous Functions on a Whole Domain [1604]
Primality of the Smallest Non-Trivial Divisor [801]
Prime Ideals of Multiplicative Systems in Integral Domains [6244]
Prime not Divisor implies Coprime [2359]
Prism on Triangular Base divided into Three Equal Tetrahedra [2283]
Prisms of equal Height with Parallelogram and Triangle as Base [2276]
Probability of Event Difference [867]
Probability of Event Union [868]
Probability of Included Event [865]
Probability of Joint Events [1802]
Probability of Laplace Experiments [975]
Probability of the Complement Event [861]
Probability of the Impossible Event [862]
Product of a Complex Number and a Convergent Complex Sequence [1719]
Product of a Real Number and a Convergent Real Sequence [1140]
Product of Composite Number with Number is Solid Number [2053]
Product of Convegent Complex Sequences [1715]
Product of Convegent Real Sequences [1135]
Product of Coprime Pairs is Coprime [2356]
Product of Geometric Progressions from One [2029]
Product of Rational Numbers is Rational [2113]
Product of Similar Plane Numbers is Square [2047]
Properties of a Complex Scalar Product [6251]
Properties of a Group Homomorphism [680]
Properties of a Real Scalar Product [6214]
Properties of Cosets [829]
Properties of Ordinal Numbers [724]
Properties of the Absolute Value [619]
Properties of Transitive Sets [721]
Proportion of Numbers is Transitive [2344]
Proportion of Sizes of Tetrahedra divided into Two Similar Tetrahedra and Two Equal Prisms [2280]
Proportional Magnitudes are Proportional Alternately [1973]
Proportional Magnitudes have Proportional Remainders [1976]
Proportional Numbers are Proportional Alternately [2343]
Proportional Numbers have Proportional Differences [2341]
Pythagorean Identity [1794]
Quotient of Convergent Complex Sequences [1722]
Quotient of Convergent Real Sequences [1142]
Quotient of Rational Numbers is Rational [2114]
Quotient Space [71]
Radius at Right Angle to Tangent [1898]
Ratio Equals its Multiples [1972]
Ratio of Areas of Equiangular Parallelograms [2009]
Ratio of Areas of Similar Triangles [2005]
Ratio of Commensurable Magnitudes [2099]
Ratio of Products of Sides of Plane Numbers [2024]
Ratio Test For Absolutely Convergent Complex Series [1729]
Ratio Test For Absolutely Convergent Series [1337]
Rational Cauchy Sequence Members Are Bounded [1489]
Rational Cauchy Sequences Build a Commutative Group With Respect To Addition [1518]
Rational Cauchy Sequences Build a Commutative Monoid With Respect To Multiplication [1520]
Rational Powers of Positive Numbers [1622]
Rationality of Rectangle Contained by Medial Straight Lines Commensurable in Square [2119]
Ratios of Equal Magnitudes [1964]
Ratios of Fractions in Lowest Terms [2350]
Ratios of Multiples of Numbers [2348]
Ratios of Numbers is Distributive over Addition [2342]
Real Numbers Can Be Approximated by Rational Numbers [1127]
Rearrangement of Absolutely Convergent Series [1364]
Rearrangement of Convergent Series [1366]
Reciprocity Law of Falling And Rising Factorial Powers [1412]
Reciprocity of Complex Exponential Function, Non-Zero Property [1738]
Reciprocity of Exponential Function of General Base, Non-Zero Property [1614]
Reciprocity of Exponential Function, Non-Zero Property [1417]
Rectangle as a Special Case of a Parallelogram [936]
Rectangle Contained by Medial Straight Lines Commensurable in Length is Medial [2118]
Rectangle is Sum of Square and Rectangle [2060]
Rectangles Contained by Proportional Straight Lines [2002]
Rectangles Contained by Three Proportional Straight Lines [2003]
Recursive Formula for Binomial Coefficients [994]
Relation of Ratios to Products‎ [2349]
Relationship Between Planarity and Biconnectivity of Graphs [1229]
Relationship Between Planarity and Connectivity of Graphs [1230]
Relationship Between the Greatest Common Divisor and the Least Common Multiple [1281]
Relative Lengths of Chords of Circles‎ [1895]
Relative Lengths of Lines Inside Circle [1887]
Relative Lengths of Lines Outside Circle [1888]
Relative Sizes of Angles in Segments [1911]
Relative Sizes of Components of Ratios [1971]
Relative Sizes of Elements in Perturbed Proportion [1978]
Relative Sizes of Magnitudes on Unequal Ratios [1967]
Relative Sizes of Proportional Magnitudes [1970]
Relative Sizes of Ratios on Unequal Magnitudes [1965]
Relative Sizes of Successive Ratios [1977]
Replacing Mutually Independent Events by Their Complements [1810]
Representing Real Cosine by Complex Exponential Function [1786]
Representing Real Sine by Complex Exponential Function [1788]
Rhombus as a Special Case of a Parallelogram [935]
Riemann Integral for Step Functions [1752]
Riemann Upper and Riemann Lower Integrals for Bounded Real Functions [1761]
Right Angle to Tangent of Circle goes through Center [1899]
Right-Distributivity Law For Natural Numbers [1436]
Root of Area contained by Rational Straight Line and Fifth Binomial [2152]
Root of Area contained by Rational Straight Line and First Binomial [2148]
Root of Area contained by Rational Straight Line and Fourth Binomial [2151]
Root of Area contained by Rational Straight Line and Second Binomial [2149]
Root of Area contained by Rational Straight Line and Sixth Binomial [2153]
Root of Area contained by Rational Straight Line and Third Binomial [2150]
Rule of Combining Different Sets of Indices [1119]
Rules for Exponentiation [676]
Rules of Calculation with Inequalities [594]
Second Apotome of Medial is Irrational [2169]
Second Bimedial is Irrational [2132]
Second Bimedial Straight Line is Divisible Uniquely [2138]
Second Law of Planetary Motion [6305]
Segment Commensurable with Medial Segment is Medial [2117]
Segment on Given Base Unique [1903]
Segments of Rational Straight Line cut in Extreme and Mean Ratio are Apotome [2300]
Side of Area Contained by Rational Straight Line and Fifth Apotome [2189]
Side of Area Contained by Rational Straight Line and First Apotome [2185]
Side of Area Contained by Rational Straight Line and Fourth Apotome [2188]
Side of Area Contained by Rational Straight Line and Second Apotome [2186]
Side of Area Contained by Rational Straight Line and Sixth Apotome [2190]
Side of Area Contained by Rational Straight Line and Third Apotome [2187]
Side of Hexagon Inscribed in a Circle Equals the Radius of that Circle [1939]
Side of Rational Plus Medial Area is Divisible Uniquely [2140]
Side of Rational plus Medial Area is Irrational [2134]
Side of Regular Pentagon inscribed in Circle with Rational Diameter is Minor [2305]
Side of Remaining Area from Rational Area from which Medial Area Subtracted [2202]
Side of Sum of Medial Areas is Irrational [2135]
Side of Sum of Two Medial Areas is Divisible Uniquely [2141]
Sides Appended of Hexagon and Decagon inscribed in same Circle are cut in Extreme and Mean Ratio [2303]
Sides of Equal and Equiangular Parallelograms are Reciprocally Proportional‎ [2000]
Sides of Equiangular Triangles are Reciprocally Proportional [2001]
Similar Circular Segments [2783]
Similar Figures on Proportional Straight Lines [2008]
Similar Figures on Sides of Right-Angled Triangle [2017]
Similar Parallelogram on Half a Straight Line [2013]
Similar Plane Numbers have Same Ratio as between Two Squares [2045]
Similar Polygons are Composed of Similar Triangles [2006]
Similar Segments on Equal Bases are Equal [1904]
Similar Solid Numbers have Same Ratio as between Two Cubes [2046]
Similar Triangles I [927]
Similarity of Polygons is Equivalence‎ Relation [2007]
Simple Binomial Identities [1839]
Simulating LOOP Programs Using WHILE Programs [1199]
Simulating WHILE Programs Using GOTO Programs (and vice versa) [1201]
Sizes of Pyramids of Same Height with Polygonal Bases are as Bases [2282]
Sizes of Tetrahedra of Same Height are as Bases [2281]
Solid Angle contained by Plane Angles is Less than Four Right Angles [2258]
Spectrum Function of Commutative Rings [6249]
Square as a Special Case of a Rhombus [966]
Square is Sum of Two Rectangles [2361]
Square of Coprime Number is Coprime [2355]
Square of Cube Number is Cube [2049]
Square on Apotome applied to Rational Straight Line [2191]
Square on Binomial Straight Line applied to Rational Straight Line [2154]
Square on First Apotome of Medial Straight Line applied to Rational Straight Line [2192]
Square on First Bimedial Straight Line applied to Rational Straight Line [2155]
Square on Major Straight Line applied to Rational Straight Line [2157]
Square on Medial Straight Line [2116]
Square on Minor Straight Line applied to Rational Straight Line [2194]
Square on Rational Straight Line applied to Apotome [2207]
Square on Rational Straight Line applied to Binomial Straight Line [2206]
Square on Second Apotome of Medial Straight Line applied to Rational Straight Line [2193]
Square on Second Bimedial Straight Line applied to Rational Straight Line [2156]
Square on Side of Equilateral Triangle inscribed in Circle is Triple Square on Radius of Circle [2306]
Square on Side of Rational plus Medial Area applied to Rational Straight Line [2158]
Square on Side of Regular Pentagon inscribed in Circle equals Squares on Sides of Hexagon and Decagon inscribed in same Circle [2304]
Square on Side of Sum of two Medial Area applied to Rational Straight Line [2159]
Square on Straight Line which produces Medial Whole with Medial Area applied to Rational Straight Line [2196]
Square on Straight Line which produces Medial Whole with Rational Area applied to Rational Straight Line [2195]
Square Roots [1161]
Straight Line cannot be in Two Planes [2238]
Straight Line Commensurable with Apotome [2197]
Straight Line Commensurable with Apotome of Medial Straight Line [2198]
Straight Line Commensurable with Bimedial Straight Line is Bimedial and of Same Order [2161]
Straight Line Commensurable with Binomial Straight Line is Binomial and of Same Order [2160]
Straight Line Commensurable with Major Straight Line is Major [2162]
Straight Line Commensurable with Minor Straight Line [2199]
Straight Line Commensurable with Side of Rational plus Medial Area [2163]
Straight Line Commensurable with Side of Sum of two Medial Areas [2164]
Straight Line Commensurable with that which produces Medial Whole with Medial Area [2201]
Straight Line Commensurable with that which produces Medial Whole with Rational Area [2200]
Straight Line cut in Extreme and Mean Ratio plus its Greater Segment [2299]
Straight Line Perpendicular to Plane from Point is Unique [2250]
Straight Lines cut in Same Ratio by Parallel Planes [2254]
Straight Lines Cut Off Equal Arcs in Equal Circles [1908]
Straight Lines Subtending Two Consecutive Angles in Regular Pentagon cut in Extreme and Mean Ratio [2302]
Subgroups of Cyclic Groups [817]
Subgroups of Finite Cyclic Groups [825]
Subsets of Finite Sets [986]
Subtraction of Divisors obeys Distributive Law [2337]
Subtraction of Multiples of Divisors obeys Distributive Law [2338]
Successor of Oridinal [774]
Sufficient Condition for Coprimality [2331]
Sum Of Angles in a Triangle and Exterior Angle [924]
Sum of Antecedent and Consequent of Proportion [1982]
Sum of Antecedents of Proportion [1981]
Sum of Arithmetic Progression [1117]
Sum of Binomial Coefficients I [1841]
Sum of Binomial Coefficients II [1843]
Sum of Binomial Coefficients III [1845]
Sum of Binomial Coefficients [1405]
Sum of Components of Equal Ratios [1969]
Sum of Convergent Complex Sequences [1711]
Sum of Convergent Real Sequences [1131]
Sum of Even Number of Odd Numbers is Even [2067]
Sum of Even Numbers is Even [2066]
Sum of Geometric Progression [1123]
Sum of Odd Number of Odd Numbers is Odd [2068]
Sum of Pair of Elements of Geometric Progression with Three Elements in Lowest Terms is Coprime to other Element [2061]
Sum of Plane Angles Used to Construct a Solid Angle is Less Than Four Right Angles [2260]
Sum of Rational Area and Medial Area gives rise to four Irrational Straight Lines [2165]
Sum of Two Angles of Three containing Solid Angle is Greater than Other Angle [2257]
Sum of two Incommensurable Medial Areas give rise to two Irrational Straight Lines [2166]
Sum of Two Supplemental Angles Equals Two Right Angles [765]
Summing Areas or Rectangles [1015]
Summing of Areas of Rectangles (II) [1017]
Summing of Areas of Rectangles (III) [1019]
Summing of Areas of Rectangles (IV) [1020]
Summing of Areas of Rectangles (V) [1021]
Summing of Areas of Rectangles (VI) [1022]
Summing of Areas of Rectangles (VII) [1023]
Summing of Areas of Rectangles (VIII) [1024]
Supremum Property, Infimum Property [1756]
Tangent Secant Theorem [1916]
Tetrahedra are Equal iff Bases are Reciprocally Proportional to Heights [2285]
Tetrahedron divided into Two Similar Tetrahedra and Two Equal Prisms [2279]
That which produces Medial Whole with Medial Area is Irrational [2172]
That which produces Medial Whole with Rational Area is Irrational [2171]
The "Angle-Side-Angle" and "Angle-Angle-Side" Theorems for the Congruence of Triangles [905]
The "Side-Angle-Side" Theorem for the Congruence of Triangle [738]
The "Side-Side-Side" Theorem for the Congruence of Triangles [753]
The absolute value makes the set of rational numbers a metric space. [1090]
The Converse of the Pythagorean Theorem [971]
The distance of complex numbers makes complex numbers a metric space. [1253]
The distance of real numbers makes real numbers a metric space. [618]
The Exterior Angle Is Greater Than Either of the Non-Adjacent Interior Angles [784]
The Fundamental Counting Principle [111]
The General Perturbation Method [1121]
The Proving Principle by Contradiction [744]
The Proving Principle By Contraposition [1330]
The Proving Principle of Complete Induction (Variant 1) [657]
The Pythagorean Theorem [968]
The set of WHILE-computable functions is included in the set of partially WHILE-computable functions [1196]
The Sum of the Lengths of Any Pair of Sides of a Triangle (Triangle Inequality) [795]
The Sum of Two Angles of a Triangle [789]
The supplemental angle of a right angle is another right angle. [654]
Theorem of Even Perfect Numbers (first part) [2080]
Theorem of Large Numbers for Relative Frequencies [1838]
Third Law of Planetary Motion [6306]
Three Intersecting Lines Perpendicular to Another Line are in One Plane [2242]
Time Dilation, Lorentz Factor [6297]
Touching Circles have Different Centers [1886]
Transitivity of Parallel Lines [919]
Transitivity of the Order Relation of Natural Numbers [1549]
Triangle Inequality [588]
Triangles of Equal Area I [947]
Triangles of Equal Area II [949]
Triangles of Equal Area III [951]
Triangles of Equal Area IV [953]
Triangles with One Equal Angle and Two Other Sides Proportional are Similar [1993]
Triangles with One Equal Angle and Two Sides Proportional are Similar [1992]
Triangles with Proportional Sides are Similar [1991]
Triangles with Two Sides Parallel and Equal [2018]
Triangles within Triangles [893]
Triangulation of an N-gon and Sum of Interior Angles [929]
Triangulation of Quadrilateral and Sum of Angles [928]
Trichotomy of Ordinals [729]
Trichotomy of the Order Relation for Natural Numbers [1552]
Two Circles have at most Two Points of Intersection [1890]
Two Coprime Integers have no Third Integer Proportional [2062]
Two Intersecting Straight Lines are in One Plane [2239]
Two Irrational Straight Lines arising from Medial Area from which Medial Area Subtracted [2204]
Two Irrational Straight Lines arising from Medial Area from which Rational Area Subtracted [2203]
Two Lines Meeting which are Parallel to Two Other Lines Meeting contain Equal Angles [2247]
Two Lines Perpendicular to Same Plane are Parallel [2243]
Union of Countable Many Countable Sets [796]
Unique Representation of Real Numbers As \(b\)-adic Fractions [1126]
Unique Solvability of \(a+x=b\) [516]
Unique Solvability of \(ax=b\) [517]
Uniqueness Lemma of a Finite Basis [1039]
Uniqueness of 1 [48]
Uniqueness of Complex Zero [1686]
Uniqueness of Integer Zero [1682]
Uniqueness of Natural Zero [1680]
Uniqueness of Negative Numbers [50]
Uniqueness Of Predecessors Of Natural Numbers [1542]
Uniqueness of Rational Zero [1684]
Uniqueness of Real Zero [43]
Uniqueness of Reciprocal Numbers [51]
Uniqueness of the Limit of a Sequence [1129]
Uniqueness of Triangles [751]
Unit Circle [1749]
Unit Ring of All Rational Cauchy Sequences [1101]
Urn Model With Replacement [1799]
Urn Model Without Replacement [1797]
Volume of Cone is Third of Cylinder on Same Base and of Same Height [2286]
Volume of Cones or Cylinders of Same Height are in Same Ratio as Bases [2287]
Volumes of Cones or Cylinders on Equal Bases are in Same Ratio as Heights [2290]
Volumes of Parts of Cylinder cut by Plane Parallel to Opposite Planes are as Parts of Axis [2289]
Volumes of Similar Cones and Cylinders are in Triplicate Ratio of Diameters of Bases [2288]
Volumes of Similar Parallelepipeds are in Triplicate Ratio to Length of Corresponding Sides [2270]
Volumes of Similar Tetrahedra are in Triplicate Ratio of Corresponding Sides [2284]
Volumes of Spheres are in Triplicate Ratio of Diameters [2294]
Well-Ordering Principle [698]
When is it possible to find a separating cycle in a biconnected graph, given a non-separating cycle? [1233]
(Real) Exponential Function Is Always Positive
Proof (related to "(Real) Exponential Function Is Always Positive") [1420]
\(-(-x)=x\)
Elementary Proof (related to "\(-(-x)=x\)") [526]
\(-(x+y)=-x-y\)
Elementary Proof (related to "\(-(x+y)=-x-y\)") [537]
\(-0=0\).
Direct Proof (related to "\(-0=0\).") [502]
\((-x)(-y)=xy\)
Elementary Proof (related to "\((-x)(-y)=xy\)") [533]
\((-x)y=-(xy)\)
Elementary Proof (related to "\((-x)y=-(xy)\)") [532]
\((x^{-1})^{-1}=x\)
Elementary Proof (related to "\((x^{-1})^{-1}=x\)") [539]
\((xy)^{-1}=x^{-1}y^{-1}\)
Elementary Proof (related to "\((xy)^{-1}=x^{-1}y^{-1}\)") [538]
\(\epsilon\)-\(\delta\) Definition of Continuity
Proof (related to "\(\epsilon\)-\(\delta\) Definition of Continuity") [1255]
\(\exp(0)=1\)
Proof (related to "\(\exp(0)=1\)") [1424]
\(\exp(0)=1\) (Complex Case)
Proof (related to "\(\exp(0)=1\) (Complex Case)") [1740]
\(0x=0\)
Elementary Proof (related to "\(0x=0\)") [527]
\(1^{-1}=1\).
Direct Proof (related to "\(1^{-1}=1\).") [501]
\(b\)-Adic Fractions Are Real Cauchy Sequences
Proof (related to "\(b\)-Adic Fractions Are Real Cauchy Sequences") [1125]
A Criterion for Isosceles Triangles
Proof (related to "A Criterion for Isosceles Triangles") [750]
A General Criterion for the Convergence of Infinite Complex Series
Proof (related to "A General Criterion for the Convergence of Infinite Complex Series") [1726]
A General Criterion for the Convergence of Infinite Series
Proof (related to "A General Criterion for the Convergence of Infinite Series") [1149]
A Necessary and a Sufficient Condition for Riemann Integrable Functions
Proof (related to "A Necessary and a Sufficient Condition for Riemann Integrable Functions") [1765]
A Necessary But Not Sufficient Condition For Convergence Of Infinite Series
Proof (related to "A Necessary But Not Sufficient Condition For Convergence Of Infinite Series") [1265]
A product of two real numbers is zero if and only if at least one of these numbers is zero.
Proof (related to "A product of two real numbers is zero if and only if at least one of these numbers is zero.") [529]
A proposition cannot be both, true and false
Proof (related to "A proposition cannot be both, true and false") [1326]
A proposition cannot be equivalent to its negation
Proof (related to "A proposition cannot be equivalent to its negation") [1327]
Addition of Complex Numbers Is Associative
Proof (related to "Addition of Complex Numbers Is Associative") [1659]
Addition of Complex Numbers Is Commutative
Proof (related to "Addition of Complex Numbers Is Commutative") [1661]
Addition of Integers
Proof (related to "Addition of Integers") [1530]
Addition of Integers Is Associative
Proof (related to "Addition of Integers Is Associative") [1444]
Algebraic Proof (related to "Addition of Integers Is Associative") [1445]
Addition of Integers Is Cancellative
Proof (related to "Addition of Integers Is Cancellative") [1463]
Addition of Integers Is Commutative
Proof (related to "Addition of Integers Is Commutative") [1461]
Addition Of Natural Numbers
Proof (related to "Addition Of Natural Numbers") [1544]
Addition Of Natural Numbers Is Associative
Proof (related to "Addition Of Natural Numbers Is Associative") [1429]
Addition of Natural Numbers Is Cancellative
Proof (related to "Addition of Natural Numbers Is Cancellative") [1433]
Addition of Natural Numbers Is Cancellative With Respect To Inequalities
Proof (related to "Addition of Natural Numbers Is Cancellative With Respect To Inequalities") [1554]
Addition of Natural Numbers Is Commutative
Proof (related to "Addition of Natural Numbers Is Commutative") [1431]
Addition of Rational Cauchy Sequences
Proof (related to "Addition of Rational Cauchy Sequences") [1487]
Addition of Rational Cauchy Sequences Is Associative
Proof (related to "Addition of Rational Cauchy Sequences Is Associative") [1495]
Addition of Rational Cauchy Sequences Is Cancellative
Proof (related to "Addition of Rational Cauchy Sequences Is Cancellative") [1570]
Addition of Rational Cauchy Sequences Is Commutative
Proof (related to "Addition of Rational Cauchy Sequences Is Commutative") [1497]
Addition Of Rational Numbers
Proof (related to "Addition Of Rational Numbers") [1515]
Addition of Rational Numbers Is Associative
Proof (related to "Addition of Rational Numbers Is Associative") [1468]
Addition of Rational Numbers Is Cancellative
Proof (related to "Addition of Rational Numbers Is Cancellative") [1472]
Addition of Rational Numbers Is Commutative
Proof (related to "Addition of Rational Numbers Is Commutative") [1470]
Addition of Real Numbers
Proof (related to "Addition of Real Numbers") [1526]
Addition Of Real Numbers Is Associative
Proof (related to "Addition Of Real Numbers Is Associative") [1527]
Addition of Real Numbers Is Cancellative
Proof (related to "Addition of Real Numbers Is Cancellative") [1576]
Addition Of Real Numbers Is Commutative
Proof (related to "Addition Of Real Numbers Is Commutative") [1528]
Algebraic Structure of Complex Numbers Together with Addition
Proof (related to "Algebraic Structure of Complex Numbers Together with Addition") [1667]
Algebraic Structure of Complex Numbers Together with Addition and Multiplication
Proof (related to "Algebraic Structure of Complex Numbers Together with Addition and Multiplication") [1691]
Algebraic Structure of Integers Together with Addition
Proof (related to "Algebraic Structure of Integers Together with Addition") [1655]
Proof (related to "Algebraic Structure of Integers Together with Addition") [1656]
Algebraic Structure of Integers Together with Addition and Multiplication
Proof (related to "Algebraic Structure of Integers Together with Addition and Multiplication") [1032]
Algebraic Structure Of Natural Numbers Together With Addition
Proof (related to "Algebraic Structure Of Natural Numbers Together With Addition") [843]
Algebraic Structure Of Natural Numbers Together With Multiplication
Proof (related to "Algebraic Structure Of Natural Numbers Together With Multiplication") [1442]
Algebraic Structure of Non-Zero Complex Numbers Together with Multiplication
Proof (related to "Algebraic Structure of Non-Zero Complex Numbers Together with Multiplication") [1689]
Algebraic Structure of Non-Zero Rational Numbers Together with Multiplication
Proof (related to "Algebraic Structure of Non-Zero Rational Numbers Together with Multiplication") [1650]
Algebraic Structure of Non-Zero Real Numbers Together with Multiplication
Proof (related to "Algebraic Structure of Non-Zero Real Numbers Together with Multiplication") [1642]
Algebraic Structure of Rational Numbers Together with Addition
Proof (related to "Algebraic Structure of Rational Numbers Together with Addition") [1648]
Algebraic Structure of Rational Numbers Together with Addition and Multiplication
Proof (related to "Algebraic Structure of Rational Numbers Together with Addition and Multiplication") [1652]
Proof (related to "Algebraic Structure of Rational Numbers Together with Addition and Multiplication") [1653]
Algebraic Structure of Real Numbers Together with Addition
Proof (related to "Algebraic Structure of Real Numbers Together with Addition") [1641]
Algebraic Structure of Real Numbers Together with Addition and Multiplication
Proof (related to "Algebraic Structure of Real Numbers Together with Addition and Multiplication") [1643]
Proof (related to "Algebraic Structure of Real Numbers Together with Addition and Multiplication") [1644]
All Convergent Real Sequences Are Cauchy Sequences
Proof (related to "All Convergent Real Sequences Are Cauchy Sequences") [1395]
Alternate Ratios of Equal Fractions
Proof (related to "Alternate Ratios of Equal Fractions") [2490]
Alternate Ratios of Multiples
Proof (related to "Alternate Ratios of Multiples") [2496]
Alternating Sum of Binomial Coefficients
Proof (related to "Alternating Sum of Binomial Coefficients") [1408]
Angle Bisector Theorem
Proof (related to "Angle Bisector Theorem") [2451]
Angles and Sides in a Triangle I
Geometric Proof (related to "Angles and Sides in a Triangle I") [792]
Angles and Sides in a Triangle II
Proof by Contradiction (related to "Angles and Sides in a Triangle II") [794]
Angles and Sides in a Triangle III
Geometric Proof (related to "Angles and Sides in a Triangle III") [900]
Angles and Sides in a Triangle IV
Geometric Proof (related to "Angles and Sides in a Triangle IV") [902]
Angles and Sides in a Triangle V
Proof (related to "Angles and Sides in a Triangle V") [904]
Angles at Intersections of Straight Lines
Geometric Proof (related to "Angles at Intersections of Straight Lines") [764]
Angles in Circles have Same Ratio as Arcs
Proof (related to "Angles in Circles have Same Ratio as Arcs") [2481]
Angles in Same Segment of Circle are Equal
Proof (related to "Angles in Same Segment of Circle are Equal") [2391]
Angles made by Chord with Tangent‎
Proof (related to "Angles made by Chord with Tangent‎") [2402]
Angles on Equal Arcs are Equal
Proof (related to "Angles on Equal Arcs are Equal") [2397]
Any Positive Characteristic Is a Prime Number
Proof by Contradiction (related to "Any Positive Characteristic Is a Prime Number") [883]
Apotome is Irrational
Proof (related to "Apotome is Irrational") [2654]
Apotome not same with Binomial Straight Line
Proof (related to "Apotome not same with Binomial Straight Line") [2692]
Area contained by Apotome and Binomial Straight Line Commensurable with Terms of Apotome and in same Ratio
Proof (related to "Area contained by Apotome and Binomial Straight Line Commensurable with Terms of Apotome and in same Ratio") [2695]
Area of Square on Greater Segment of Straight Line cut in Extreme and Mean Ratio
Proof (related to "Area of Square on Greater Segment of Straight Line cut in Extreme and Mean Ratio") [2755]
Area of Square on Lesser Segment of Straight Line cut in Extreme and Mean Ratio
Proof (related to "Area of Square on Lesser Segment of Straight Line cut in Extreme and Mean Ratio") [2757]
Area of Squares on Whole and Lesser Segment of Straight Line cut in Extreme and Mean Ratio
Proof (related to "Area of Squares on Whole and Lesser Segment of Straight Line cut in Extreme and Mean Ratio") [2758]
Areas of Circles are as Squares on Diameters
Proof (related to "Areas of Circles are as Squares on Diameters") [2738]
Areas of Similar Polygons Inscribed in Circles are as Squares on Diameters
Proof (related to "Areas of Similar Polygons Inscribed in Circles are as Squares on Diameters") [2737]
Areas of Triangles and Parallelograms Proportional to Base
Proof (related to "Areas of Triangles and Parallelograms Proportional to Base") [2449]
Barycentric Coordinates, Barycenter
Proof (related to "Barycentric Coordinates, Barycenter") [6284]
Basic Rules of Manipulating Finite Sums
Proof (related to "Basic Rules of Manipulating Finite Sums") [1115]
Basis Arithmetic Operations Involving Differentiable Functions, Product Rule, Quotient Rule
Proof (related to "Basis Arithmetic Operations Involving Differentiable Functions, Product Rule, Quotient Rule") [1376]
Bayes' Theorem
Proof (related to "Bayes' Theorem") [1833]
Bernoulli's Inequality
Proof by Induction (related to "Bernoulli's Inequality") [1338]
Between two Cubes exist two Mean Proportionals
Proof (related to "Between two Cubes exist two Mean Proportionals") [2531]
Between two Similar Plane Numbers exists one Mean Proportional
Proof (related to "Between two Similar Plane Numbers exists one Mean Proportional") [2537]
Between two Similar Solid Numbers exist two Mean Proportionals
Proof (related to "Between two Similar Solid Numbers exist two Mean Proportionals") [2538]
Between two Squares exists one Mean Proportional
Proof (related to "Between two Squares exists one Mean Proportional") [2530]
Binomial Distribution
Proof (related to "Binomial Distribution") [1818]
Binomial is Irrational
Proof (related to "Binomial is Irrational") [2617]
Binomial Straight Line is Divisible into Terms Uniquely
Proof (related to "Binomial Straight Line is Divisible into Terms Uniquely") [2623]
Binomial Theorem
Proof by Induction (related to "Binomial Theorem") [1398]
Bisecting a Segment
Geometric Proof (related to "Bisecting a Segment") [758]
Bisecting an Angle
Geometric Proof (related to "Bisecting an Angle") [756]
Bisection of Arc
Proof (related to "Bisection of Arc") [2400]
Boolean Function
Proof (related to "Boolean Function") [1317]
Calculating the Number of Distinct Positive Divisors
Proof (related to "Calculating the Number of Distinct Positive Divisors") [1303]
Calculating with Complex Conjugates
Proof (related to "Calculating with Complex Conjugates") [1252]
Calculation Rules for General Powers
Proof (related to "Calculation Rules for General Powers") [1629]
Calculation Rules for the Big O Notation
Proof (related to "Calculation Rules for the Big O Notation") [1168]
Cancellation Law
Proof (related to "Cancellation Law") [824]
Cardinal Number
Proof (related to "Cardinal Number") [981]
Cauchy Product of Absolutely Convergent Series
Proof (related to "Cauchy Product of Absolutely Convergent Series") [1396]
Cauchy Product of Convergent Series Is Not Necessarily Convergent
Proof (related to "Cauchy Product of Convergent Series Is Not Necessarily Convergent") [1393]
Characteristic String
Proof (related to "Characteristic String") [1002]
Characterization of Cutvertices
Proof (related to "Characterization of Cutvertices") [1239]
Characterization of Independent Events
Proof (related to "Characterization of Independent Events") [1805]
Characterization of Independent Events II
Proof (related to "Characterization of Independent Events II") [1807]
Chords do not Bisect Each Other
Proof (related to "Chords do not Bisect Each Other") [2374]
Circles Touch at One Point at Most
Proof (related to "Circles Touch at One Point at Most") [2383]
Circumscribing about Circle Triangle Equiangular with Given
Proof (related to "Circumscribing about Circle Triangle Equiangular with Given") [2410]
Circumscribing Circle about Regular Pentagon
Proof (related to "Circumscribing Circle about Regular Pentagon") [2421]
Circumscribing Circle about Square
Proof (related to "Circumscribing Circle about Square") [2416]
Circumscribing Circle about Triangle
Proof (related to "Circumscribing Circle about Triangle") [2412]
Circumscribing Regular Pentagon about Circle
Proof (related to "Circumscribing Regular Pentagon about Circle") [2419]
Circumscribing Square about Circle
Proof (related to "Circumscribing Square about Circle") [2414]
Closed Formula For Binomial Coefficients
Combinatorial Proof (related to "Closed Formula For Binomial Coefficients") [1401]
Combining Rays to Straight Lines
Proof by Contradiction (related to "Combining Rays to Straight Lines") [768]
Commensurability is Transitive Relation
Proof (related to "Commensurability is Transitive Relation") [2593]
Commensurability of Elements of Proportional Magnitudes
Proof (related to "Commensurability of Elements of Proportional Magnitudes") [2592]
Commensurability of Squares
Proof (related to "Commensurability of Squares") [2590]
Commensurability of Squares on Proportional Straight Lines
Proof (related to "Commensurability of Squares on Proportional Straight Lines") [2595]
Commensurability of Sum of Commensurable Magnitudes
Proof (related to "Commensurability of Sum of Commensurable Magnitudes") [2596]
Commensurable Magnitudes are Incommensurable with Same Magnitude
Proof (related to "Commensurable Magnitudes are Incommensurable with Same Magnitude") [2594]
Common Section of Bisecting Planes of Cube Bisect and are Bisected by Diagonal of Cube
Proof (related to "Common Section of Bisecting Planes of Cube Bisect and are Bisected by Diagonal of Cube") [2735]
Common Section of Planes Perpendicular to other Plane is Perpendicular to that Plane
Proof (related to "Common Section of Planes Perpendicular to other Plane is Perpendicular to that Plane") [2715]
Common Section of Two Planes is Straight Line
Proof (related to "Common Section of Two Planes is Straight Line") [2699]
Common Sections of Parallel Planes with other Plane are Parallel
Proof (related to "Common Sections of Parallel Planes with other Plane are Parallel") [2712]
Comparing Natural Numbers Using the Concept of Addition
Proof (related to "Comparing Natural Numbers Using the Concept of Addition") [1548]
Comparison of Sides of Five Platonic Figures
Proof (related to "Comparison of Sides of Five Platonic Figures") [2772]
Complementary Segments of Parallelograms
Geometric Proof (related to "Complementary Segments of Parallelograms") [960]
Completeness Principle For Complex Numbers
Proof (related to "Completeness Principle For Complex Numbers") [1710]
Completeness Principle For Real Numbers
Proof (related to "Completeness Principle For Real Numbers") [1128]
Complex Cauchy Sequences Vs. Real Cauchy Sequences
Proof (related to "Complex Cauchy Sequences Vs. Real Cauchy Sequences") [1706]
Complex Conjugate of Complex Exponential Function
Proof (related to "Complex Conjugate of Complex Exponential Function") [1748]
Complex Exponential Function
Proof (related to "Complex Exponential Function") [1731]
Complex Numbers are a Field Extension of Real Numbers
Proof (related to "Complex Numbers are a Field Extension of Real Numbers") [1244]
Complex Numbers are Two-Dimensional and the Complex Numbers \(1\) and Imaginary Unit \(i\) Form Their Basis
Proof (related to "Complex Numbers are Two-Dimensional and the Complex Numbers \(1\) and Imaginary Unit \(i\) Form Their Basis") [1699]
Complex Numbers as a Vector Space Over the Field of Real Numbers
Proof (related to "Complex Numbers as a Vector Space Over the Field of Real Numbers") [1695]
Composition of Continuous Functions at a Single Point
Proof (related to "Composition of Continuous Functions at a Single Point") [1607]
Composition of Relations (Sometimes) Preserves Their Left-Total Property
Proof (related to "Composition of Relations (Sometimes) Preserves Their Left-Total Property") [1313]
Composition of Relations Preserves Their Right-Uniqueness Property
Proof (related to "Composition of Relations Preserves Their Right-Uniqueness Property") [1311]
Composition of Total Functions
Proof (related to "Composition of Total Functions") [1315]
Compositions of Continuous Functions on a Whole Domain
Proof (related to "Compositions of Continuous Functions on a Whole Domain") [1609]
Condition for Commensurability of Roots of Quadratic Equation
Proof (related to "Condition for Commensurability of Roots of Quadratic Equation") [2598]
Condition for Equal Angles contained by Elevated Straight Lines from Plane Angles
Proof (related to "Condition for Equal Angles contained by Elevated Straight Lines from Plane Angles") [2732]
Condition for Existence of Fourth Number Proportional to Three Numbers
Proof (related to "Condition for Existence of Fourth Number Proportional to Three Numbers") [2565]
Condition for Existence of Third Number Proportional to Two Numbers
Proof (related to "Condition for Existence of Third Number Proportional to Two Numbers") [2564]
Condition for Incommensurability of Roots of Quadratic Equation
Proof (related to "Condition for Incommensurability of Roots of Quadratic Equation") [2599]
Condition for Point to be Center of Circle
Proof (related to "Condition for Point to be Center of Circle") [2379]
Conditions for Diameter to be Perpendicular Bisector
Proof (related to "Conditions for Diameter to be Perpendicular Bisector") [2373]
Cones or Cylinders are Equal iff Bases are Reciprocally Proportional to Heights
Proof (related to "Cones or Cylinders are Equal iff Bases are Reciprocally Proportional to Heights") [2751]
Connection between Quotient, Remainder, Modulo and Floor Function
Proof (related to "Connection between Quotient, Remainder, Modulo and Floor Function") [1285]
Connectivity Is an Equivalence Relation - Components Are a Partition of a Graph
Proof (related to "Connectivity Is an Equivalence Relation - Components Are a Partition of a Graph") [1222]
Constructing a Parallel Line from a Line and a Point
Geometric Proof (related to "Constructing a Parallel Line from a Line and a Point") [922]
Constructing a Perpendicular Segment to a Straight Line From a Given Point Not On the Straight Line
Geometric Proof (related to "Constructing a Perpendicular Segment to a Straight Line From a Given Point Not On the Straight Line") [762]
Constructing a Perpendicular Segment to a Straight Line From a Given Point On the Stright Line
Geometric Proof (related to "Constructing a Perpendicular Segment to a Straight Line From a Given Point On the Stright Line") [761]
Constructing a Segment Equal to an Arbitrary Segment
Geometric Proof (related to "Constructing a Segment Equal to an Arbitrary Segment") [735]
Constructing an Angle Equal to an Arbitrary Rectilinear Angle
Geometric Proof (related to "Constructing an Angle Equal to an Arbitrary Rectilinear Angle") [898]
Constructing an Equilateral Triangle
Geometric Proof (Euclid) (related to "Constructing an Equilateral Triangle") [695]
Construction of a Light Clock
Proof (related to "Construction of a Light Clock") [6276]
Construction of a Square II
Geometric Proof (related to "Construction of a Square II") [1029]
Construction of a Square on a given Segment
Geometric Proof (related to "Construction of a Square on a given Segment") [967]
Construction of Apotome is Unique
Proof (related to "Construction of Apotome is Unique") [2660]
Construction of Circle from Segment
Proof (related to "Construction of Circle from Segment") [2395]
Construction of Components of First Bimedial
Proof (related to "Construction of Components of First Bimedial") [2608]
Construction of Components of Major
Proof (related to "Construction of Components of Major") [2614]
Construction of Components of Second Bimedial
Proof (related to "Construction of Components of Second Bimedial") [2609]
Construction of Components of Side of Rational plus Medial Area
Proof (related to "Construction of Components of Side of Rational plus Medial Area") [2615]
Construction of Components of Side of Sum of Medial Areas
Proof (related to "Construction of Components of Side of Sum of Medial Areas") [2616]
Construction of Cube within Given Sphere
Proof (related to "Construction of Cube within Given Sphere") [2769]
Construction of Equilateral Polygon with Even Number of Sides in Outer of Concentric Circles
Proof (related to "Construction of Equilateral Polygon with Even Number of Sides in Outer of Concentric Circles") [2752]
Construction of Fields from Integral Domains
Proof (related to "Construction of Fields from Integral Domains") [889]
Construction of Fifth Apotome
Proof (related to "Construction of Fifth Apotome") [2670]
Construction of Fifth Binomial Straight Line
Proof (related to "Construction of Fifth Binomial Straight Line") [2633]
Construction of Figure Similar to One and Equal to Another
Proof (related to "Construction of Figure Similar to One and Equal to Another") [2473]
Construction of First Apotome
Proof (related to "Construction of First Apotome") [2666]
Construction of First Apotome of Medial is Unique
Proof (related to "Construction of First Apotome of Medial is Unique") [2661]
Construction of First Binomial Straight Line
Proof (related to "Construction of First Binomial Straight Line") [2629]
Construction of Fourth Apotome
Proof (related to "Construction of Fourth Apotome") [2669]
Construction of Fourth Binomial Straight Line
Proof (related to "Construction of Fourth Binomial Straight Line") [2632]
Construction of Fourth Proportional Straight Line
Proof (related to "Construction of Fourth Proportional Straight Line") [2460]
Construction of Geometric Progression in Lowest Terms
Proof (related to "Construction of Geometric Progression in Lowest Terms") [2521]
Construction of Golden Section
Proof (related to "Construction of Golden Section") [2478]
Construction of Groups from Commutative and Cancellative Semigroups
Proof (related to "Construction of Groups from Commutative and Cancellative Semigroups") [840]
Construction of Incommensurable Lines
Proof (related to "Construction of Incommensurable Lines") [2591]
Construction of Isosceles Triangle whose Base Angle is Twice Apex
Proof (related to "Construction of Isosceles Triangle whose Base Angle is Twice Apex") [2417]
Construction of Mean Proportional‎
Proof (related to "Construction of Mean Proportional‎") [2461]
Construction of Medial Straight Lines Commensurable in Square Only containing Medial Rectangle whose Square Differences Commensura
Proof (related to "Construction of Medial Straight Lines Commensurable in Square Only containing Medial Rectangle whose Square Differences Commensura") [2613]
Construction of Medial Straight Lines Commensurable in Square Only containing Rational Rectangle whose Square Differences Commensu
Proof (related to "Construction of Medial Straight Lines Commensurable in Square Only containing Rational Rectangle whose Square Differences Commensu") [2612]
Construction of Minor is Unique
Proof (related to "Construction of Minor is Unique") [2663]
Construction of Parallelepiped Similar to Given Parallelepiped
Proof (related to "Construction of Parallelepiped Similar to Given Parallelepiped") [2724]
Construction of Parallelogram Equal to Given Figure Exceeding a Parallelogram
Proof (related to "Construction of Parallelogram Equal to Given Figure Exceeding a Parallelogram") [2477]
Construction of Parallelogram Equal to Given Figure Less a Parallelogram
Proof (related to "Construction of Parallelogram Equal to Given Figure Less a Parallelogram") [2476]
Construction of Parallelograms I
Geometric Proof (related to "Construction of Parallelograms I") [958]
Construction of Parallelograms II
Geometric Proof (related to "Construction of Parallelograms II") [962]
Construction of Parallelograms III
Geometric Proof (related to "Construction of Parallelograms III") [964]
Construction of Part of Line
Proof (related to "Construction of Part of Line") [2457]
Construction of Polyhedron in Outer of Concentric Spheres
Proof (related to "Construction of Polyhedron in Outer of Concentric Spheres") [2753]
Construction of Rational Straight Lines Commensurable in Square Only whose Square Differences Commensurable with Greater
Proof (related to "Construction of Rational Straight Lines Commensurable in Square Only whose Square Differences Commensurable with Greater") [2610]
Construction of Rational Straight Lines Commensurable in Square Only whose Square Differences Incommensurable with Greater
Proof (related to "Construction of Rational Straight Lines Commensurable in Square Only whose Square Differences Incommensurable with Greater") [2611]
Construction of Regular Dodecahedron within Given Sphere
Proof (related to "Construction of Regular Dodecahedron within Given Sphere") [2771]
Construction of Regular Icosahedron within Given Sphere
Proof (related to "Construction of Regular Icosahedron within Given Sphere") [2770]
Construction of Regular Octahedron within Given Sphere
Proof (related to "Construction of Regular Octahedron within Given Sphere") [2768]
Construction of Regular Tetrahedron within Given Sphere
Proof (related to "Construction of Regular Tetrahedron within Given Sphere") [2767]
Construction of Second Apotome
Proof (related to "Construction of Second Apotome") [2667]
Construction of Second Apotome of Medial is Unique
Proof (related to "Construction of Second Apotome of Medial is Unique") [2662]
Construction of Second Binomial Straight Line
Proof (related to "Construction of Second Binomial Straight Line") [2630]
Construction of Segment on Given Circle Admitting Given Angle
Proof (related to "Construction of Segment on Given Circle Admitting Given Angle") [2404]
Construction of Segment on Given Line Admitting Given Angle
Proof (related to "Construction of Segment on Given Line Admitting Given Angle") [2403]
Construction of Sequence of Numbers with Given Ratios
Proof (related to "Construction of Sequence of Numbers with Given Ratios") [2523]
Construction of Similar Polygon
Proof (related to "Construction of Similar Polygon") [2466]
Construction of Similarly Cut Straight Line
Proof (related to "Construction of Similarly Cut Straight Line") [2458]
Construction of Sixth Apotome
Proof (related to "Construction of Sixth Apotome") [2671]
Construction of Sixth Binomial Straight Line
Proof (related to "Construction of Sixth Binomial Straight Line") [2634]
Construction of Solid Angle equal to Given Solid Angle
Proof (related to "Construction of Solid Angle equal to Given Solid Angle") [2723]
Construction of Solid Angle from Three Plane Angles any Two of which are Greater than Other Angle
Proof (related to "Construction of Solid Angle from Three Plane Angles any Two of which are Greater than Other Angle") [2720]
Construction of Straight Line Perpendicular to Plane from point not on Plane
Proof (related to "Construction of Straight Line Perpendicular to Plane from point not on Plane") [2707]
Construction of Straight Line Perpendicular to Plane from point on Plane
Proof (related to "Construction of Straight Line Perpendicular to Plane from point on Plane") [2708]
Construction of Tangent from Point to Circle
Proof (related to "Construction of Tangent from Point to Circle") [2387]
Construction of that which produces Medial Whole with Medial Area is Unique
Proof (related to "Construction of that which produces Medial Whole with Medial Area is Unique") [2665]
Construction of that which produces Medial Whole with Rational Area is Unique
Proof (related to "Construction of that which produces Medial Whole with Rational Area is Unique") [2664]
Construction of Third Apotome
Proof (related to "Construction of Third Apotome") [2668]
Construction of Third Binomial Straight Line
Proof (related to "Construction of Third Binomial Straight Line") [2631]
Construction of Third Proportional Straight Line‎
Proof (related to "Construction of Third Proportional Straight Line‎") [2459]
Construction of Triangles From Arbitrary Segments
Geometric Proof (related to "Construction of Triangles From Arbitrary Segments") [896]
Continuity of Complex Exponential Function
Proof (related to "Continuity of Complex Exponential Function") [1744]
Continuity of Cosine and Sine
Proof (related to "Continuity of Cosine and Sine") [1785]
Continuity of Exponential Function
Proof (related to "Continuity of Exponential Function") [1425]
Continuity of Exponential Function of General Base
Proof (related to "Continuity of Exponential Function of General Base") [1611]
Contraposition of Cancellative Law for Adding Integers
Proof by Contraposition (related to "Contraposition of Cancellative Law for Adding Integers") [1562]
Contraposition of Cancellative Law for Adding Natural Numbers
Proof by Contraposition (related to "Contraposition of Cancellative Law for Adding Natural Numbers") [1546]
Contraposition of Cancellative Law for Adding Rational Numbers
Proof by Contraposition (related to "Contraposition of Cancellative Law for Adding Rational Numbers") [1566]
Contraposition of Cancellative Law for Adding Real Numbers
Proof (related to "Contraposition of Cancellative Law for Adding Real Numbers") [1579]
Contraposition of Cancellative Law for Multiplying Integers
Proof by Contraposition (related to "Contraposition of Cancellative Law for Multiplying Integers") [1564]
Contraposition of Cancellative Law for Multiplying Natural Numbers
Proof by Contraposition (related to "Contraposition of Cancellative Law for Multiplying Natural Numbers") [1560]
Contraposition of Cancellative Law for Multiplying Rational Numbers
Proof by Contraposition (related to "Contraposition of Cancellative Law for Multiplying Rational Numbers") [1568]
Contraposition of Cancellative Law of for Multiplying Real Numbers
Proof (related to "Contraposition of Cancellative Law of for Multiplying Real Numbers") [1581]
Convergence Behavior of the Sequence \((b^n)\)
Proof (related to "Convergence Behavior of the Sequence \((b^n)\)") [1352]
Convergence Behaviour of Absolutely Convergent Series
Proof (related to "Convergence Behaviour of Absolutely Convergent Series") [1269]
Convergence of Alternating Harmonic Series
Proof (related to "Convergence of Alternating Harmonic Series") [1368]
Convergence of Complex Conjugate Sequence
Proof (related to "Convergence of Complex Conjugate Sequence") [1708]
Convergence of Infinite Series with Non-Negative Terms
Proof (related to "Convergence of Infinite Series with Non-Negative Terms") [1159]
Convergent Complex Sequences Are Bounded
Proof (related to "Convergent Complex Sequences Are Bounded") [1717]
Convergent Complex Sequences Vs. Convergent Real Sequences
Proof (related to "Convergent Complex Sequences Vs. Convergent Real Sequences") [1703]
Convergent Rational Sequences With Limit \(0\) Are a Subgroup of Rational Cauchy Sequences With Respect To Addition
Proof (related to "Convergent Rational Sequences With Limit \(0\) Are a Subgroup of Rational Cauchy Sequences With Respect To Addition") [1523]
Convergent Rational Sequences With Limit \(0\) Are an Ideal Of the Ring of Rational Cauchy Sequences
Proof (related to "Convergent Rational Sequences With Limit \(0\) Are an Ideal Of the Ring of Rational Cauchy Sequences") [1525]
Convergent Rational Sequences With Limit \(0\) Are Rational Cauchy Sequences
Proof (related to "Convergent Rational Sequences With Limit \(0\) Are Rational Cauchy Sequences") [1517]
Convergent Sequences are Bounded
Proof (related to "Convergent Sequences are Bounded") [1138]
Convergent Sequences are Cauchy Sequences
Proof (related to "Convergent Sequences are Cauchy Sequences") [1074]
Converse of Area of Square on Greater Segment of Straight Line cut in Extreme and Mean Ratio
Proof (related to "Converse of Area of Square on Greater Segment of Straight Line cut in Extreme and Mean Ratio") [2756]
Converse of Tangent Secant Theorem
Proof (related to "Converse of Tangent Secant Theorem") [2407]
Coprime Numbers form Fraction in Lowest Terms
Proof (related to "Coprime Numbers form Fraction in Lowest Terms") [2502]
Corollaries From the Group Axioms
Proof (related to "Corollaries From the Group Axioms") [556]
Counting the Set's Elements Using Its Partition
Proof (related to "Counting the Set's Elements Using Its Partition") [991]
Criteria for Subgroups
Proof (related to "Criteria for Subgroups") [812]
Criterion for Alternating Infinite Series
Proof (related to "Criterion for Alternating Infinite Series") [1267]
Cube Number multiplied by Cube Number is Cube
Proof (related to "Cube Number multiplied by Cube Number is Cube") [2550]
Cutting a Segment at a Given Size
Geometric Proof (related to "Cutting a Segment at a Given Size") [737]
Cyclic Groups are Abelian
Proof (related to "Cyclic Groups are Abelian") [814]
Definition of Integers
Proof (related to "Definition of Integers") [845]
Definition of Rational Numbers
Proof (related to "Definition of Rational Numbers") [1034]
Definition of Real Numbers
Proof (related to "Definition of Real Numbers") [1106]
Definition of the Metric Space \(\mathbb R^n\), Euclidean Norm
Proof (related to "Definition of the Metric Space \(\mathbb R^n\), Euclidean Norm") [1207]
Derivative of a Constant Function
Proof (related to "Derivative of a Constant Function") [1373]
Derivative of a Linear Function \(ax+b\)
Proof (related to "Derivative of a Linear Function \(ax+b\)") [1380]
Direct Proof (related to "Derivative of a Linear Function \(ax+b\)") [1379]
Difference of Convergent Complex Sequences
Proof (related to "Difference of Convergent Complex Sequences") [1721]
Difference of Convergent Real Sequences
Proof (related to "Difference of Convergent Real Sequences") [1134]
Direct Comparison Test For Absolutely Convergent Complex Series (Majorant Criterion)
Proof (related to "Direct Comparison Test For Absolutely Convergent Complex Series (Majorant Criterion)") [1728]
Direct Comparison Test For Absolutely Convergent Series (Majorant Criterion)
Proof (related to "Direct Comparison Test For Absolutely Convergent Series (Majorant Criterion)") [1271]
Direct Comparison Test For Divergence Series
Proof by Contradiction (related to "Direct Comparison Test For Divergence Series") [1336]
Discovery of Irrational Numbers
Geometric Proof (related to "Discovery of Irrational Numbers") [1097]
Distance in Normed Vector Spaces
Proof (related to "Distance in Normed Vector Spaces") [848]
Distributivity Law for Complex Numbers
Proof (related to "Distributivity Law for Complex Numbers") [1679]
Distributivity Law For Integers
Proof (related to "Distributivity Law For Integers") [1467]
Distributivity Law For Natural Numbers
Proof by Induction (related to "Distributivity Law For Natural Numbers") [1031]
Distributivity Law For Rational Cauchy Sequences
Proof (related to "Distributivity Law For Rational Cauchy Sequences") [1507]
Distributivity Law For Rational Numbers
Proof (related to "Distributivity Law For Rational Numbers") [1492]
Distributivity Law For Real Numbers
Proof (related to "Distributivity Law For Real Numbers") [1582]
Divergence of Harmonic Series
Proof (related to "Divergence of Harmonic Series") [1334]
Divisibility Laws
Direct Proof (related to "Divisibility Laws") [514]
Divisibility of Elements of Geometric Progression from One where First Element is Prime
Proof (related to "Divisibility of Elements of Geometric Progression from One where First Element is Prime") [2559]
Divisibility of Principal Ideals
Proof (related to "Divisibility of Principal Ideals") [1067]
Division with Quotient and Remainder
Proof (related to "Division with Quotient and Remainder") [819]
Divisor is Reciprocal of Divisor of Integer
Proof (related to "Divisor is Reciprocal of Divisor of Integer") [2518]
Divisor of One of Coprime Numbers is Coprime to Other
Proof (related to "Divisor of One of Coprime Numbers is Coprime to Other") [2504]
Divisors obey Distributive Law
Proof (related to "Divisors obey Distributive Law") [2486]
Divisors of a Product Of Many Factors, Co-Prime to All But One Factor, Divide This Factor
Proof (related to "Divisors of a Product Of Many Factors, Co-Prime to All But One Factor, Divide This Factor") [1301]
Divisors of a Product Of Two Factors, Co-Prime to One Factor Divide the Other Factor
Proof (related to "Divisors of a Product Of Two Factors, Co-Prime to One Factor Divide the Other Factor") [1294]
Divisors of Integers
Proof (related to "Divisors of Integers") [1274]
Double Summation
Proof (related to "Double Summation") [1426]
Elements of Geometric Progression between Coprime Numbers
Proof (related to "Elements of Geometric Progression between Coprime Numbers") [2528]
Elements of Geometric Progression from One Divisible by Prime
Proof (related to "Elements of Geometric Progression from One Divisible by Prime") [2558]
Elements of Geometric Progression from One where First Element is not Power of Number
Proof (related to "Elements of Geometric Progression from One where First Element is not Power of Number") [2556]
Elements of Geometric Progression from One where First Element is Power of Number
Proof (related to "Elements of Geometric Progression from One where First Element is Power of Number") [2555]
Elements of Geometric Progression from One which are Powers of Number
Proof (related to "Elements of Geometric Progression from One which are Powers of Number") [2554]
Elements of Geometric Progression from One which Divide Later Elements
Proof (related to "Elements of Geometric Progression from One which Divide Later Elements") [2557]
Equal Angles in Equal Circles
Proof (related to "Equal Angles in Equal Circles") [2396]
Equal Arcs of Circles Subtended by Equal Straight Lines
Proof (related to "Equal Arcs of Circles Subtended by Equal Straight Lines") [2399]
Equal Chords in Circle
Proof (related to "Equal Chords in Circle") [2384]
Equality of Ratios Ex Aequali
Proof (related to "Equality of Ratios Ex Aequali") [2445]
Equality of Ratios in Perturbed Proportion
Proof (related to "Equality of Ratios in Perturbed Proportion") [2446]
Equality of Ratios is Transitive
Proof (related to "Equality of Ratios is Transitive") [2434]
Equiangular Triangles are Similar
Proof (related to "Equiangular Triangles are Similar") [2452]
Equilateral Pentagon is Equiangular if Three Angles are Equal
Proof (related to "Equilateral Pentagon is Equiangular if Three Angles are Equal") [2761]
Equivalence of Set Inclusion and Element Inclusion of Ordinals
Proof (related to "Equivalence of Set Inclusion and Element Inclusion of Ordinals") [776]
Equivalency of Vectors in Vector Space If their Difference Forms a Subspace
Proof (related to "Equivalency of Vectors in Vector Space If their Difference Forms a Subspace") [6329]
Equivalent Statements Regarding Parallel Lines
Proof (related to "Equivalent Statements Regarding Parallel Lines") [918]
Estimate for the Remainder Term of Complex Exponential Function
Proof (related to "Estimate for the Remainder Term of Complex Exponential Function") [1733]
Estimate for the Remainder Term of Exponential Function
Proof (related to "Estimate for the Remainder Term of Exponential Function") [1362]
Euclidean Lemma
Proof (related to "Euclidean Lemma") [806]
Proof (related to "Euclidean Lemma") [1300]
Euclidean Sum of Geometric Progression
Proof (related to "Euclidean Sum of Geometric Progression") [2580]
Euler's Formula
Proof (related to "Euler's Formula") [1784]
Even Number minus Even Number is Even
Proof (related to "Even Number minus Even Number is Even") [2569]
Even Number minus Odd Number is Odd
Proof (related to "Even Number minus Odd Number is Odd") [2570]
Even Number of Vertices with an Odd Degree in Finite Digraphs
Elementary Proof (related to "Even Number of Vertices with an Odd Degree in Finite Digraphs") [569]
Even Number of Vertices with an Odd Degree in Finite Graphs
Proof (related to "Even Number of Vertices with an Odd Degree in Finite Graphs") [1176]
Eveness of the Cosine of a Real Variable
Proof (related to "Eveness of the Cosine of a Real Variable") [1791]
Every Bounded Real Sequence Has a Convergent Subsequence
Proof (related to "Every Bounded Real Sequence Has a Convergent Subsequence") [1154]
Every Contraposition is a Tautology
Proof (related to "Every Contraposition is a Tautology") [1329]
Every Distance Is Positive Definite
Direct Proof (related to "Every Distance Is Positive Definite") [616]
Every Natural Number Is Greater or Equal Zero
Proof (related to "Every Natural Number Is Greater or Equal Zero") [1557]
Every Proposition Implies Itself
Proof (related to "Every Proposition Implies Itself") [1324]
Existence of Arbitrarily Small Positive Rational Numbers
Proof (related to "Existence of Arbitrarily Small Positive Rational Numbers") [1847]
Existence of Arbitrarily Small Powers
Proof (related to "Existence of Arbitrarily Small Powers") [1351]
Existence of Complex One (Neutral Element of Multiplication of Complex Numbers)
Proof (related to "Existence of Complex One (Neutral Element of Multiplication of Complex Numbers)") [1674]
Existence of Complex Zero (Neutral Element of Addition of Complex Numbers)
Proof (related to "Existence of Complex Zero (Neutral Element of Addition of Complex Numbers)") [1663]
Existence of Fraction of Number Smaller than Given Number
Proof (related to "Existence of Fraction of Number Smaller than Given Number") [2582]
Existence of Integer One (Neutral Element of Multiplication of Integers)
Proof (related to "Existence of Integer One (Neutral Element of Multiplication of Integers)") [1459]
Existence of Integer Zero (Neutral Element of Addition of Integers)
Proof (related to "Existence of Integer Zero (Neutral Element of Addition of Integers)") [1453]
Existence of Inverse Complex Numbers With Respect to Addition
Proof (related to "Existence of Inverse Complex Numbers With Respect to Addition") [1665]
Existence of Inverse Complex Numbers With Respect to Multiplication
Proof (related to "Existence of Inverse Complex Numbers With Respect to Multiplication") [1676]
Existence of Inverse Integers With Respect to Addition
Proof (related to "Existence of Inverse Integers With Respect to Addition") [1513]
Existence of Inverse Rational Cauchy Sequences With Respect to Addition
Proof (related to "Existence of Inverse Rational Cauchy Sequences With Respect to Addition") [1510]
Existence of Inverse Rational Numbers With Respect to Addition
Proof (related to "Existence of Inverse Rational Numbers With Respect to Addition") [1512]
Existence of Inverse Rational Numbers With Respect to Multiplication
Proof (related to "Existence of Inverse Rational Numbers With Respect to Multiplication") [1677]
Existence of Inverse Real Numbers With Respect to Addition
Proof (related to "Existence of Inverse Real Numbers With Respect to Addition") [1587]
Existence of Inverse Real Numbers With Respect to Multiplication
Proof (related to "Existence of Inverse Real Numbers With Respect to Multiplication") [1651]
Existence of Lowest Common Multiple
Proof (related to "Existence of Lowest Common Multiple") [2514]
Existence of Natural Numbers Exceeding Positive Real Numbers
Proof (related to "Existence of Natural Numbers Exceeding Positive Real Numbers") [1341]
Existence of Natural One (Neutral Element of Multiplication of Natural Numbers)
Proof (related to "Existence of Natural One (Neutral Element of Multiplication of Natural Numbers)") [1458]
Existence of Natural Zero (Neutral Element of Addition of Natural Numbers)
Proof (related to "Existence of Natural Zero (Neutral Element of Addition of Natural Numbers)") [1456]
Existence of Parallel Straight Lines
Proof by Contradiction (related to "Existence of Parallel Straight Lines") [787]
Existence of Powers Exceeding Any Positive Constant
Proof (related to "Existence of Powers Exceeding Any Positive Constant") [1349]
Existence of Prime Divisors
Proof (related to "Existence of Prime Divisors") [799]
Existence of Rational Cauchy Sequence of Ones (Neutral Element of Multiplication of Rational Cauchy Sequences)
Proof (related to "Existence of Rational Cauchy Sequence of Ones (Neutral Element of Multiplication of Rational Cauchy Sequences)") [1505]
Existence of Rational Cauchy Sequence of Zeros (Neutral Element of Addition of Rational Cauchy Sequences)
Proof (related to "Existence of Rational Cauchy Sequence of Zeros (Neutral Element of Addition of Rational Cauchy Sequences)") [1499]
Existence of Rational One (Neutral Element of Multiplication of Rational Numbers)
Proof (related to "Existence of Rational One (Neutral Element of Multiplication of Rational Numbers)") [1483]
Existence of Rational Zero (Neutral Element of Addition of Rational Numbers)
Proof (related to "Existence of Rational Zero (Neutral Element of Addition of Rational Numbers)") [1474]
Existence of Real One (Neutral Element of Multiplication of Real Numbers)
Proof (related to "Existence of Real One (Neutral Element of Multiplication of Real Numbers)") [1537]
Existence of Real Zero (Neutral Element of Addition of Real Numbers)
Proof (related to "Existence of Real Zero (Neutral Element of Addition of Real Numbers)") [1536]
Exponential Function
Proof (related to "Exponential Function") [1343]
Exponential Function Is Strictly Monotonically Increasing
Proof (related to "Exponential Function Is Strictly Monotonically Increasing") [1595]
Exponential Function of General Base With Integer Exponents
Proof (related to "Exponential Function of General Base With Integer Exponents") [1621]
Exponential Function of General Base With Natural Exponents
Proof by Induction (related to "Exponential Function of General Base With Natural Exponents") [1617]
Extremities of Line Segments containing three Plane Angles any Two of which are Greater than Other form Triangle
Proof (related to "Extremities of Line Segments containing three Plane Angles any Two of which are Greater than Other form Triangle") [2718]
Factor Groups
Proof (related to "Factor Groups") [1099]
Factor Rings
Proof (related to "Factor Rings") [1100]
Factorial
Proof (related to "Factorial") [1006]
Factorials and Stirling Numbers of the First Kind
Proof (related to "Factorials and Stirling Numbers of the First Kind") [1008]
Fiber of Prime Ideals Under a Spectrum Function
Proof (related to "Fiber of Prime Ideals Under a Spectrum Function") [6263]
Finding the Centre of a given Circle
Geometric Proof (related to "Finding the Centre of a given Circle") [1059]
Finite Basis Theorem
Proof (related to "Finite Basis Theorem") [1046]
Finite Cardinal Numbers and Set Operations
Proof (related to "Finite Cardinal Numbers and Set Operations") [989]
First Apotome of Medial is Irrational
Proof (related to "First Apotome of Medial is Irrational") [2655]
First Bimedial is Irrational
Proof (related to "First Bimedial is Irrational") [2618]
First Bimedial Straight Line is Divisible Uniquely
Proof (related to "First Bimedial Straight Line is Divisible Uniquely") [2624]
First Element of Geometric Progression not dividing Second
Proof (related to "First Element of Geometric Progression not dividing Second") [2525]
First Element of Geometric Progression that divides Last also divides Second
Proof (related to "First Element of Geometric Progression that divides Last also divides Second") [2526]
Fitting Chord Into Circle
Proof (related to "Fitting Chord Into Circle") [2408]
Five Platonic Solids
Proof (related to "Five Platonic Solids") [2773]
Four Straight Lines are Proportional iff Similar Parallelepipeds formed on them are Proportional
Proof (related to "Four Straight Lines are Proportional iff Similar Parallelepipeds formed on them are Proportional") [2734]
From Medial Straight Line arises Infinite Number of Irrational Straight Lines
Proof (related to "From Medial Straight Line arises Infinite Number of Irrational Straight Lines") [2696]
Functional Equation of the Complex Exponential Function
Proof (related to "Functional Equation of the Complex Exponential Function") [1737]
Functional Equation of the Exponential Function
Proof (related to "Functional Equation of the Exponential Function") [1416]
Functional Equation of the Exponential Function of General Base
Proof (related to "Functional Equation of the Exponential Function of General Base") [1613]
Functional Equation of the Exponential Function of General Base (Revised)
Proof (related to "Functional Equation of the Exponential Function of General Base (Revised)") [1631]
Functional Equation of the Natural Logarithm
Proof (related to "Functional Equation of the Natural Logarithm") [1602]
Fundamental Lemma of Homogeneous Systems of Linear Equations
Proof by Induction (related to "Fundamental Lemma of Homogeneous Systems of Linear Equations") [1047]
Fundamental Theorem of Arithmetic
Proof (related to "Fundamental Theorem of Arithmetic") [802]
General Associative Law
Direct Proof (related to "General Associative Law") [545]
General Associative Law of Multiplication
Direct Proof (related to "General Associative Law of Multiplication") [547]
General Commutative Law
Direct Proof (related to "General Commutative Law") [546]
General Commutative Law of Multiplication
Direct Proof (related to "General Commutative Law of Multiplication") [548]
General Powers of Positive Numbers
Proof (related to "General Powers of Positive Numbers") [1627]
Generalized Euclidean Lemma
Proof (related to "Generalized Euclidean Lemma") [1299]
Generating Co-Prime Numbers Knowing the Greatest Common Divisor
Proof (related to "Generating Co-Prime Numbers Knowing the Greatest Common Divisor") [1290]
Generating the Greatest Common Divisor Knowing Co-Prime Numbers
Proof (related to "Generating the Greatest Common Divisor Knowing Co-Prime Numbers") [1292]
Geometric Distribution
Proof (related to "Geometric Distribution") [1827]
Geometric Progression in Lowest Terms has Coprime Extremes
Proof (related to "Geometric Progression in Lowest Terms has Coprime Extremes") [2522]
Geometric Progression with Coprime Extremes is in Lowest Terms
Proof (related to "Geometric Progression with Coprime Extremes is in Lowest Terms") [2520]
Geometric Progressions in Proportion have Same Number of Elements
Proof (related to "Geometric Progressions in Proportion have Same Number of Elements") [2527]
Get All Components of a Graph
Proof of Correctness (related to "Get All Components of a Graph") [1224]
Proof of Time Complexity (related to "Get All Components of a Graph") [1225]
Get the Component Induced by Vertices Connected to a Given Vertex
Proof of Correctness (related to "Get the Component Induced by Vertices Connected to a Given Vertex") [1218]
Proof of Time Complexity (related to "Get the Component Induced by Vertices Connected to a Given Vertex") [1217]
Get the Cut Vertices and Biconnected Components of a Connected Graph
Proof (related to "Get the Cut Vertices and Biconnected Components of a Connected Graph") [1241]
Greatest Common Divisor (Euclid)
Proof of Correctness (related to "Greatest Common Divisor (Euclid)") [1286]
Greatest Common Divisor and Least Common Multiple of Ideals
Proof (related to "Greatest Common Divisor and Least Common Multiple of Ideals") [1070]
Greatest Common Divisor of Three Numbers
Proof (related to "Greatest Common Divisor of Three Numbers") [2484]
Greatest Common Divisor of Two Numbers - Euclidean Algorithm
Proof (related to "Greatest Common Divisor of Two Numbers - Euclidean Algorithm") [2483]
Greatest Common Divisors Of Integers and Prime Numbers
Proof (related to "Greatest Common Divisors Of Integers and Prime Numbers") [1297]
Greatest Common Measure of Commensurable Magnitudes
Proof (related to "Greatest Common Measure of Commensurable Magnitudes") [2584]
Greatest Common Measure of Three Commensurable Magnitudes
Proof (related to "Greatest Common Measure of Three Commensurable Magnitudes") [2585]
Group Homomorphisms and Normal Subgroups
Proof (related to "Group Homomorphisms and Normal Subgroups") [835]
Group Homomorphisms with Cyclic Groups
Proof (related to "Group Homomorphisms with Cyclic Groups") [816]
Handshaking Lemma for Finite Digraphs
Combinatorial Proof (related to "Handshaking Lemma for Finite Digraphs") [567]
Handshaking Lemma for Finite Graphs
Proof (related to "Handshaking Lemma for Finite Graphs") [1174]
Horner Scheme
Proof of Correctness (related to "Horner Scheme") [1360]
Proof of Time Complexity (related to "Horner Scheme") [1359]
How Convergence Preserves the Order Relation of Sequence Members
Proof (related to "How Convergence Preserves the Order Relation of Sequence Members") [1146]
How Convergence Preserves Upper and Lower Bounds For Sequence Members
Proof (related to "How Convergence Preserves Upper and Lower Bounds For Sequence Members") [1147]
How the Boundary Changes the Property of a Set of Being Open
Topological Proof (related to "How the Boundary Changes the Property of a Set of Being Open") [1204]
If First of Four Numbers in Geometric Progression is Cube then Fourth is Cube
Proof (related to "If First of Four Numbers in Geometric Progression is Cube then Fourth is Cube") [2542]
If First of Three Numbers in Geometric Progression is Square then Third is Square
Proof (related to "If First of Three Numbers in Geometric Progression is Square then Third is Square") [2541]
If Ratio of Cube to Number is as between Two Cubes then Number is Cube
Proof (related to "If Ratio of Cube to Number is as between Two Cubes then Number is Cube") [2544]
If Ratio of Square to Number is as between Two Squares then Number is Square
Proof (related to "If Ratio of Square to Number is as between Two Squares then Number is Square") [2543]
Imaginary Unit
Proof (related to "Imaginary Unit") [1693]
Incommensurability of Sum of Incommensurable Magnitudes
Proof (related to "Incommensurability of Sum of Incommensurable Magnitudes") [2597]
Incommensurable Magnitudes do not Terminate in Euclidean Algorithm
Proof (related to "Incommensurable Magnitudes do not Terminate in Euclidean Algorithm") [2583]
Incommensurable Magnitudes Have Irrational Ratio
Proof (related to "Incommensurable Magnitudes Have Irrational Ratio") [2588]
Indefinite Integral, Antiderivative
Proof (related to "Indefinite Integral, Antiderivative") [1774]
Inequality of Natural Numbers and Their Successors
Proof by Contraposition (related to "Inequality of Natural Numbers and Their Successors") [1541]
Infinite Geometric Series
Proof (related to "Infinite Geometric Series") [1354]
Infinite Number of Primes
Analytic Proof (Erdös 1938) (related to "Infinite Number of Primes") [510]
Proof by Contradiction (Euclid) (related to "Infinite Number of Primes") [509]
Proof by Contradiction (Kummer) (related to "Infinite Number of Primes") [515]
Inscribed Angle Theorem
Proof (related to "Inscribed Angle Theorem") [2390]
Inscribing Circle in Regular Pentagon
Proof (related to "Inscribing Circle in Regular Pentagon") [2420]
Inscribing Circle in Square
Proof (related to "Inscribing Circle in Square") [2415]
Inscribing Circle in Triangle
Proof (related to "Inscribing Circle in Triangle") [2411]
Inscribing in Circle Triangle Equiangular with Given
Proof (related to "Inscribing in Circle Triangle Equiangular with Given") [2409]
Inscribing Regular 15-gon in Circle
Proof (related to "Inscribing Regular 15-gon in Circle") [2423]
Inscribing Regular Pentagon in Circle
Proof (related to "Inscribing Regular Pentagon in Circle") [2418]
Inscribing Square in Circle
Proof (related to "Inscribing Square in Circle") [2413]
Integer Coprime to all Factors is Coprime to Whole
Proof (related to "Integer Coprime to all Factors is Coprime to Whole") [2505]
Integer Divided by Divisor is Integer
Proof (related to "Integer Divided by Divisor is Integer") [2517]
Intermediate Value Theorem
Proof (related to "Intermediate Value Theorem") [1263]
Intersecting Chord Theorem
Proof (related to "Intersecting Chord Theorem") [2405]
Intersecting Circles have Different Centers
Proof (related to "Intersecting Circles have Different Centers") [2375]
Intersection of Convex Affine Sets
Proof (related to "Intersection of Convex Affine Sets") [6290]
Invertible Functions on Real Intervals
Proof (related to "Invertible Functions on Real Intervals") [1382]
Isometry is Injective
Proof (related to "Isometry is Injective") [2780]
Isosceles Triagles I
Geometric Proof (related to "Isosceles Triagles I") [741]
Isosceles Triagles II
Proof by Contradiction (related to "Isosceles Triagles II") [746]
It is true that something can be (either) true or false
Proof (related to "It is true that something can be (either) true or false") [1325]
Kernel and Image of a Group Homomorphism are Subgroups
Proof (related to "Kernel and Image of a Group Homomorphism are Subgroups") [834]
Kernel and Image of Group Homomorphism
Proof (related to "Kernel and Image of Group Homomorphism") [810]
Last Element of Geometric Progression with Coprime Extremes has no Integer Proportional as First to Second
Proof (related to "Last Element of Geometric Progression with Coprime Extremes has no Integer Proportional as First to Second") [2563]
Law of Total Probability
Proof (related to "Law of Total Probability") [1828]
Least Common Multiple
Proof (related to "Least Common Multiple") [1277]
Least Common Multiple Divides Common Multiple
Proof (related to "Least Common Multiple Divides Common Multiple") [2515]
Least Common Multiple of Three Numbers
Proof (related to "Least Common Multiple of Three Numbers") [2516]
Least Number with Three Given Fractions
Proof (related to "Least Number with Three Given Fractions") [2519]
Least Ratio of Numbers
Proof (related to "Least Ratio of Numbers") [2513]
Limit of N-th Roots
Proof (related to "Limit of N-th Roots") [1625]
Line at Right Angles to Diameter of Circle At its Ends Touches the Circle
Proof (related to "Line at Right Angles to Diameter of Circle At its Ends Touches the Circle") [2386]
Line Joining Centers of Two Circles Touching Externally
Proof (related to "Line Joining Centers of Two Circles Touching Externally") [2382]
Line Joining Centers of Two Circles Touching Internally
Proof (related to "Line Joining Centers of Two Circles Touching Internally") [2381]
Line joining Points on Parallel Lines is in Same Plane
Proof (related to "Line joining Points on Parallel Lines is in Same Plane") [2703]
Line Parallel to Perpendicular Line to Plane is Perpendicular to Same Plane
Proof (related to "Line Parallel to Perpendicular Line to Plane is Perpendicular to Same Plane") [2704]
Line Perpendicular to Two Intersecting Lines is Perpendicular to their Plane
Proof (related to "Line Perpendicular to Two Intersecting Lines is Perpendicular to their Plane") [2700]
Linear Independence of the Imaginary Unit \(i\) and the Complex Number \(1\)
Proof (related to "Linear Independence of the Imaginary Unit \(i\) and the Complex Number \(1\)") [1697]
Linearity and Monotony of the Riemann Integral
Proof (related to "Linearity and Monotony of the Riemann Integral") [1771]
Linearity and Monotony of the Riemann Integral for Step Functions
Proof (related to "Linearity and Monotony of the Riemann Integral for Step Functions") [1760]
Lines Parallel to Same Line not in Same Plane are Parallel to each other
Proof (related to "Lines Parallel to Same Line not in Same Plane are Parallel to each other") [2705]
LOOP-Computable Functions are Total
Proof (related to "LOOP-Computable Functions are Total") [1186]
Magnitude of Divisors
Proof (related to "Magnitude of Divisors") [1279]
Magnitudes Proportional Compounded are Proportional Separated
Proof (related to "Magnitudes Proportional Compounded are Proportional Separated") [2440]
Magnitudes Proportional Separated are Proportional Compounded
Proof (related to "Magnitudes Proportional Separated are Proportional Compounded") [2441]
Magnitudes with Irrational Ratio are Incommensurable
Proof (related to "Magnitudes with Irrational Ratio are Incommensurable") [2589]
Magnitudes with Rational Ratio are Commensurable
Proof (related to "Magnitudes with Rational Ratio are Commensurable") [2587]
Magnitudes with Same Ratios are Equal
Proof (related to "Magnitudes with Same Ratios are Equal") [2432]
Major is Irrational
Proof (related to "Major is Irrational") [2620]
Major Straight Line is Divisible Uniquely
Proof (related to "Major Straight Line is Divisible Uniquely") [2626]
Mean Value Theorem For Riemann Integrals
Proof (related to "Mean Value Theorem For Riemann Integrals") [1773]
Medial Area not greater than Medial Area by Rational Area
Proof (related to "Medial Area not greater than Medial Area by Rational Area") [2607]
Medial is Irrational
Proof (related to "Medial is Irrational") [2602]
Metric Spaces and Empty Sets are Clopen
Proof (related to "Metric Spaces and Empty Sets are Clopen") [855]
Metric Spaces are Hausdorff Spaces
Topological Proof (related to "Metric Spaces are Hausdorff Spaces") [851]
Minor is Irrational
Proof (related to "Minor is Irrational") [2657]
Monotone Convergence
Proof (related to "Monotone Convergence") [1157]
Monotonically Increasing Property of Probability Distributions
Proof (related to "Monotonically Increasing Property of Probability Distributions") [1817]
Multinomial Coefficient
Proof (related to "Multinomial Coefficient") [1820]
Multinomial Distribution
Proof (related to "Multinomial Distribution") [1826]
Multinomial Theorem
Proof by Induction (related to "Multinomial Theorem") [1823]
Multiples of Alternate Ratios of Equal Fractions
Proof (related to "Multiples of Alternate Ratios of Equal Fractions") [2491]
Multiples of Divisors obey Distributive Law
Proof (related to "Multiples of Divisors obey Distributive Law") [2487]
Multiples of Ratios of Numbers
Proof (related to "Multiples of Ratios of Numbers") [2498]
Multiples of Terms in Equal Ratios
Proof (related to "Multiples of Terms in Equal Ratios") [2427]
Multiplication of Complex Numbers Is Associative
Proof (related to "Multiplication of Complex Numbers Is Associative") [1670]
Multiplication of Complex Numbers Is Commutative
Proof (related to "Multiplication of Complex Numbers Is Commutative") [1672]
Multiplication of Integers
Proof (related to "Multiplication of Integers") [1531]
Multiplication of Integers Is Associative
Proof (related to "Multiplication of Integers Is Associative") [1451]
Multiplication of Integers Is Cancellative
Proof (related to "Multiplication of Integers Is Cancellative") [1465]
Multiplication of Integers Is Commutative
Proof (related to "Multiplication of Integers Is Commutative") [1449]
Multiplication of Natural Numbers Is Associative
Proof (related to "Multiplication of Natural Numbers Is Associative") [1439]
Multiplication of Natural Numbers Is Cancellative
Proof (related to "Multiplication of Natural Numbers Is Cancellative") [1441]
Multiplication of Natural Numbers Is Cancellative With Respect to the Order Relation
Proof (related to "Multiplication of Natural Numbers Is Cancellative With Respect to the Order Relation") [1584]
Multiplication of Natural Numbers is Commutative
Proof (related to "Multiplication of Natural Numbers is Commutative") [1438]
Multiplication of Numbers is Associative
Proof (related to "Multiplication of Numbers is Associative") [2426]
Geometric Proof (related to "Multiplication of Numbers is Associative") [2788]
Multiplication of Numbers is Left Distributive over Addition
Proof (related to "Multiplication of Numbers is Left Distributive over Addition") [2786]
Geometric Proof (related to "Multiplication of Numbers is Left Distributive over Addition") [2424]
Multiplication of Numbers is Right Distributive over Addition
Proof (related to "Multiplication of Numbers is Right Distributive over Addition") [2425]
Geometric Proof (related to "Multiplication of Numbers is Right Distributive over Addition") [2787]
Multiplication Of Rational Cauchy Sequences
Proof (related to "Multiplication Of Rational Cauchy Sequences") [1493]
Multiplication of Rational Cauchy Sequences Is Associative
Proof (related to "Multiplication of Rational Cauchy Sequences Is Associative") [1501]
Multiplication of Rational Cauchy Sequences Is Cancellative
Proof (related to "Multiplication of Rational Cauchy Sequences Is Cancellative") [1573]
Multiplication of Rational Cauchy Sequences Is Commutative
Proof (related to "Multiplication of Rational Cauchy Sequences Is Commutative") [1503]
Multiplication Of Rational Numbers
Proof (related to "Multiplication Of Rational Numbers") [1529]
Multiplication of Rational Numbers Is Associative
Proof (related to "Multiplication of Rational Numbers Is Associative") [1477]
Multiplication Of Rational Numbers Is Cancellative
Proof (related to "Multiplication Of Rational Numbers Is Cancellative") [1481]
Multiplication Of Rational Numbers Is Commutative
Proof (related to "Multiplication Of Rational Numbers Is Commutative") [1479]
Multiplication of Real Numbers
Proof (related to "Multiplication of Real Numbers") [1533]
Multiplication of Real Numbers Is Associative
Proof (related to "Multiplication of Real Numbers Is Associative") [1534]
Multiplication of Real Numbers Is Cancellative
Proof (related to "Multiplication of Real Numbers Is Cancellative") [1577]
Multiplication of Real Numbers Is Commutative
Proof (related to "Multiplication of Real Numbers Is Commutative") [1535]
Multiplication of Real Numbers is Left Distributive over Subtraction
Proof (related to "Multiplication of Real Numbers is Left Distributive over Subtraction") [2428]
Multiplication of Real Numbers is Right Distributive over Subtraction‎
Proof (related to "Multiplication of Real Numbers is Right Distributive over Subtraction‎") [2429]
Multiplying Negative and Positive Integers
Proof (related to "Multiplying Negative and Positive Integers") [1590]
Multiplying Negative and Positive Rational Numbers
Proof (related to "Multiplying Negative and Positive Rational Numbers") [1597]
Multiplying Negative and Positive Real Numbers
Proof (related to "Multiplying Negative and Positive Real Numbers") [1599]
Natural Logarithm
Proof (related to "Natural Logarithm") [1600]
Natural Number Divisor or Multiple of Divisor of Another
Proof (related to "Natural Number Divisor or Multiple of Divisor of Another") [2485]
Natural Number is Prime or has Prime Factor
Proof (related to "Natural Number is Prime or has Prime Factor") [2512]
Natural Number Multiplication is Commutative
Proof (related to "Natural Number Multiplication is Commutative") [2497]
Not all Cauchy sequences converge in the set of rational numbers.
Proof (related to "Not all Cauchy sequences converge in the set of rational numbers.") [1098]
Nth Powers
Proof (related to "Nth Powers") [1619]
Nth Roots of Positive Numbers
Proof (related to "Nth Roots of Positive Numbers") [1383]
Number divides Number iff Cube divides Cube
Proof (related to "Number divides Number iff Cube divides Cube") [2534]
Number divides Number iff Square divides Square
Proof (related to "Number divides Number iff Square divides Square") [2533]
Number does not divide Number iff Cube does not divide Cube
Proof (related to "Number does not divide Number iff Cube does not divide Cube") [2536]
Number does not divide Number iff Square does not divide Square
Proof (related to "Number does not divide Number iff Square does not divide Square") [2535]
Number multiplied by Cube Number making Cube is itself Cube
Proof (related to "Number multiplied by Cube Number making Cube is itself Cube") [2551]
Number neither whose Half is Odd nor Power of Two is both Even-Times Even and Even-Times Odd
Proof (related to "Number neither whose Half is Odd nor Power of Two is both Even-Times Even and Even-Times Odd") [2579]
Number of Relations on a Finite Set
Proof (related to "Number of Relations on a Finite Set") [1000]
Number of Strings With a Fixed Length Over an Alphabet with k Letters
Proof (related to "Number of Strings With a Fixed Length Over an Alphabet with k Letters") [997]
Number of Subsets of a Finite Set
Proof (related to "Number of Subsets of a Finite Set") [1003]
Proof by Induction (related to "Number of Subsets of a Finite Set") [999]
Number Squared making Cube is itself Cube
Proof (related to "Number Squared making Cube is itself Cube") [2552]
Number whose Half is Odd is Even-Times Odd
Proof (related to "Number whose Half is Odd is Even-Times Odd") [2578]
Numbers are Coprime iff Sum is Coprime to Both
Proof (related to "Numbers are Coprime iff Sum is Coprime to Both") [2508]
Numbers between which exist two Mean Proportionals are Similar Solid
Proof (related to "Numbers between which exist two Mean Proportionals are Similar Solid") [2540]
Numbers between which exists one Mean Proportional are Similar Plane
Proof (related to "Numbers between which exists one Mean Proportional are Similar Plane") [2539]
Numbers forming Fraction in Lowest Terms are Coprime
Proof (related to "Numbers forming Fraction in Lowest Terms are Coprime") [2503]
Numbers whose Product is Square are Similar Plane Numbers
Proof (related to "Numbers whose Product is Square are Similar Plane Numbers") [2548]
Odd Divisor of Even Number also divides its Half
Proof (related to "Odd Divisor of Even Number also divides its Half") [2575]
Odd Number Coprime to Number is also Coprime to its Double
Proof (related to "Odd Number Coprime to Number is also Coprime to its Double") [2576]
Odd Number minus Even Number is Odd
Proof (related to "Odd Number minus Even Number is Odd") [2572]
Odd Number minus Odd Number is Even
Proof (related to "Odd Number minus Odd Number is Even") [2571]
Odd Number multiplied by Even Number is Even
Proof (related to "Odd Number multiplied by Even Number is Even") [2573]
Odd Number multiplied by Odd Number is Odd
Proof (related to "Odd Number multiplied by Odd Number is Odd") [2574]
Oddness of the Sine of a Real Variable
Proof (related to "Oddness of the Sine of a Real Variable") [1793]
Open and Closed Subsets of a Zariski Topology
Proof (related to "Open and Closed Subsets of a Zariski Topology") [6327]
Opposite Angles of Cyclic Quadrilateral
Proof (related to "Opposite Angles of Cyclic Quadrilateral") [2392]
Opposite Angles on Intersecting Straight Lines
Geometric Proof (related to "Opposite Angles on Intersecting Straight Lines") [783]
Opposite Planes of Solid contained by Parallel Planes are Equal Parallelograms
Proof (related to "Opposite Planes of Solid contained by Parallel Planes are Equal Parallelograms") [2721]
Opposite Sides and Opposite Angles of Parallelograms
Geometric Proof (related to "Opposite Sides and Opposite Angles of Parallelograms") [934]
Order Relation for Natural Numbers, Revised
Proof (related to "Order Relation for Natural Numbers, Revised") [1558]
Ordinals Are Downward Closed
Proof (related to "Ordinals Are Downward Closed") [728]
Parallel Equal Segments Determine a Parallelogram
Geometric Proof (related to "Parallel Equal Segments Determine a Parallelogram") [932]
Parallel Line in Triangle Cuts Sides Proportionally
Proof (related to "Parallel Line in Triangle Cuts Sides Proportionally") [2450]
Parallel Lines I
Geometric Proof (related to "Parallel Lines I") [912]
Parallel Lines II
Geometric Proof (related to "Parallel Lines II") [914]
Parallel Lines III
Geometric Proof (related to "Parallel Lines III") [916]
Parallelepiped cut by Plane Parallel to Opposite Planes
Proof (related to "Parallelepiped cut by Plane Parallel to Opposite Planes") [2722]
Parallelepiped cut by Plane through Diagonals of Opposite Planes is Bisected
Proof (related to "Parallelepiped cut by Plane through Diagonals of Opposite Planes is Bisected") [2725]
Parallelepiped formed from Three Proportional Lines equal to Equilateral Parallelepiped with Equal Angles to it formed on Mean
Proof (related to "Parallelepiped formed from Three Proportional Lines equal to Equilateral Parallelepiped with Equal Angles to it formed on Mean") [2733]
Parallelepipeds are of Equal Volume iff Bases are in Reciprocal Proportion to Heights
Proof (related to "Parallelepipeds are of Equal Volume iff Bases are in Reciprocal Proportion to Heights") [2731]
Parallelepipeds of Same Height have Volume Proportional to Bases
Proof (related to "Parallelepipeds of Same Height have Volume Proportional to Bases") [2729]
Parallelepipeds on Equal Bases and Same Height are Equal in Volume
Proof (related to "Parallelepipeds on Equal Bases and Same Height are Equal in Volume") [2728]
Parallelepipeds on Same Base and Same Height whose Extremities are not on Same Lines are Equal in Volume
Proof (related to "Parallelepipeds on Same Base and Same Height whose Extremities are not on Same Lines are Equal in Volume") [2727]
Parallelepipeds on Same Base and Same Height whose Extremities are on Same Lines are Equal in Volume
Proof (related to "Parallelepipeds on Same Base and Same Height whose Extremities are on Same Lines are Equal in Volume") [2726]
Parallelogram Similar and in Same Angle has Same Diameter
Proof (related to "Parallelogram Similar and in Same Angle has Same Diameter") [2474]
Parallelograms About Diameter are Similar
Proof (related to "Parallelograms About Diameter are Similar") [2472]
Parallelograms and Triagles
Geometric Proof (related to "Parallelograms and Triagles") [956]
Parallelograms on Equal Bases and on the Same Parallels
Geometric Proof (related to "Parallelograms on Equal Bases and on the Same Parallels") [946]
Parallelograms On the Same Base and On the Same Parallels
Geometric Proof (related to "Parallelograms On the Same Base and On the Same Parallels") [944]
Perpendicular in Right-Angled Triangle makes two Similar Triangles
Proof (related to "Perpendicular in Right-Angled Triangle makes two Similar Triangles") [2456]
Plane through Straight Line Perpendicular to other Plane is Perpendicular to that Plane
Proof (related to "Plane through Straight Line Perpendicular to other Plane is Perpendicular to that Plane") [2714]
Planes Perpendicular to same Straight Line are Parallel
Proof (related to "Planes Perpendicular to same Straight Line are Parallel") [2710]
Planes through Parallel Pairs of Meeting Lines are Parallel
Proof (related to "Planes through Parallel Pairs of Meeting Lines are Parallel") [2711]
Position of Minus Sign in Rational Numbers Representations
Proof (related to "Position of Minus Sign in Rational Numbers Representations") [1593]
Power of Two is Even-Times Even Only
Proof (related to "Power of Two is Even-Times Even Only") [2577]
Powers of Coprime Numbers are Coprime
Proof (related to "Powers of Coprime Numbers are Coprime") [2774]
Powers of Elements of Geometric Progression are in Geometric Progression
Proof (related to "Powers of Elements of Geometric Progression are in Geometric Progression") [2532]
Preservation of Continuity with Arithmetic Operations on Continuous Functions
Proof (related to "Preservation of Continuity with Arithmetic Operations on Continuous Functions") [1262]
Preservation of Continuity with Arithmetic Operations on Continuous Functions on a Whole Domain
Proof (related to "Preservation of Continuity with Arithmetic Operations on Continuous Functions on a Whole Domain") [1605]
Prime not Divisor implies Coprime
Proof (related to "Prime not Divisor implies Coprime") [2509]
Prism on Triangular Base divided into Three Equal Tetrahedra
Proof (related to "Prism on Triangular Base divided into Three Equal Tetrahedra") [2743]
Prisms of equal Height with Parallelogram and Triangle as Base
Proof (related to "Prisms of equal Height with Parallelogram and Triangle as Base") [2736]
Probability of Event Difference
Proof (related to "Probability of Event Difference") [870]
Probability of Event Union
Proof (related to "Probability of Event Union") [869]
Probability of Included Event
Proof (related to "Probability of Included Event") [866]
Probability of Joint Events
Proof (related to "Probability of Joint Events") [1803]
Probability of Laplace Experiments
Proof (related to "Probability of Laplace Experiments") [976]
Probability of the Complement Event
Proof (related to "Probability of the Complement Event") [863]
Probability of the Impossible Event
Proof (related to "Probability of the Impossible Event") [864]
Product of a Complex Number and a Convergent Complex Sequence
Proof (related to "Product of a Complex Number and a Convergent Complex Sequence") [1720]
Product of a Real Number and a Convergent Real Sequence
Proof (related to "Product of a Real Number and a Convergent Real Sequence") [1141]
Product of Composite Number with Number is Solid Number
Proof (related to "Product of Composite Number with Number is Solid Number") [2553]
Product of Convegent Complex Sequences
Proof (related to "Product of Convegent Complex Sequences") [1718]
Product of Convegent Real Sequences
Proof (related to "Product of Convegent Real Sequences") [1139]
Product of Coprime Pairs is Coprime
Proof (related to "Product of Coprime Pairs is Coprime") [2507]
Product of Geometric Progressions from One
Proof (related to "Product of Geometric Progressions from One") [2529]
Product of Rational Numbers is Rational
Proof (related to "Product of Rational Numbers is Rational") [2600]
Product of Similar Plane Numbers is Square
Proof (related to "Product of Similar Plane Numbers is Square") [2547]
Properties of a Group Homomorphism
Direct Proof (related to "Properties of a Group Homomorphism") [681]
Properties of Cosets
Proof (related to "Properties of Cosets") [830]
Properties of Ordinal Numbers
Proof (related to "Properties of Ordinal Numbers") [725]
Properties of the Absolute Value
Proof (related to "Properties of the Absolute Value") [1089]
Properties of Transitive Sets
Proof (related to "Properties of Transitive Sets") [722]
Proportion of Numbers is Transitive
Proof (related to "Proportion of Numbers is Transitive") [2495]
Proportion of Sizes of Tetrahedra divided into Two Similar Tetrahedra and Two Equal Prisms
Proof (related to "Proportion of Sizes of Tetrahedra divided into Two Similar Tetrahedra and Two Equal Prisms") [2740]
Proportional Magnitudes are Proportional Alternately
Proof (related to "Proportional Magnitudes are Proportional Alternately") [2439]
Proportional Magnitudes have Proportional Remainders
Proof (related to "Proportional Magnitudes have Proportional Remainders") [2442]
Proportional Numbers are Proportional Alternately
Proof (related to "Proportional Numbers are Proportional Alternately") [2494]
Proportional Numbers have Proportional Differences
Proof (related to "Proportional Numbers have Proportional Differences") [2492]
Pythagorean Identity
Proof (related to "Pythagorean Identity") [1795]
Quotient of Convergent Complex Sequences
Proof (related to "Quotient of Convergent Complex Sequences") [1723]
Quotient of Convergent Real Sequences
Proof (related to "Quotient of Convergent Real Sequences") [1143]
Quotient of Rational Numbers is Rational
Proof (related to "Quotient of Rational Numbers is Rational") [2601]
Quotient Space
Proof (related to "Quotient Space") [6331]
Radius at Right Angle to Tangent
Proof (related to "Radius at Right Angle to Tangent") [2388]
Ratio Equals its Multiples
Proof (related to "Ratio Equals its Multiples") [2438]
Ratio of Areas of Equiangular Parallelograms
Proof (related to "Ratio of Areas of Equiangular Parallelograms") [2471]
Ratio of Areas of Similar Triangles
Proof (related to "Ratio of Areas of Similar Triangles") [2467]
Ratio of Commensurable Magnitudes
Proof (related to "Ratio of Commensurable Magnitudes") [2586]
Ratio of Products of Sides of Plane Numbers
Proof (related to "Ratio of Products of Sides of Plane Numbers") [2524]
Ratio Test For Absolutely Convergent Complex Series
Proof (related to "Ratio Test For Absolutely Convergent Complex Series") [1730]
Ratio Test For Absolutely Convergent Series
Proof (related to "Ratio Test For Absolutely Convergent Series") [1355]
Rational Cauchy Sequence Members Are Bounded
Proof (related to "Rational Cauchy Sequence Members Are Bounded") [1490]
Rational Cauchy Sequences Build a Commutative Group With Respect To Addition
Proof (related to "Rational Cauchy Sequences Build a Commutative Group With Respect To Addition") [1519]
Rational Cauchy Sequences Build a Commutative Monoid With Respect To Multiplication
Proof (related to "Rational Cauchy Sequences Build a Commutative Monoid With Respect To Multiplication") [1521]
Rational Powers of Positive Numbers
Proof (related to "Rational Powers of Positive Numbers") [1623]
Rationality of Rectangle Contained by Medial Straight Lines Commensurable in Square
Proof (related to "Rationality of Rectangle Contained by Medial Straight Lines Commensurable in Square") [2606]
Ratios of Equal Magnitudes
Proof (related to "Ratios of Equal Magnitudes") [2430]
Ratios of Fractions in Lowest Terms
Proof (related to "Ratios of Fractions in Lowest Terms") [2501]
Ratios of Multiples of Numbers
Proof (related to "Ratios of Multiples of Numbers") [2499]
Ratios of Numbers is Distributive over Addition
Proof (related to "Ratios of Numbers is Distributive over Addition") [2493]
Rearrangement of Absolutely Convergent Series
Proof (related to "Rearrangement of Absolutely Convergent Series") [1365]
Reciprocity Law of Falling And Rising Factorial Powers
Proof (related to "Reciprocity Law of Falling And Rising Factorial Powers") [1413]
Reciprocity of Complex Exponential Function, Non-Zero Property
Proof (related to "Reciprocity of Complex Exponential Function, Non-Zero Property") [1741]
Reciprocity of Exponential Function of General Base, Non-Zero Property
Proof (related to "Reciprocity of Exponential Function of General Base, Non-Zero Property") [1615]
Reciprocity of Exponential Function, Non-Zero Property
Proof (related to "Reciprocity of Exponential Function, Non-Zero Property") [1418]
Rectangle Contained by Medial Straight Lines Commensurable in Length is Medial
Proof (related to "Rectangle Contained by Medial Straight Lines Commensurable in Length is Medial") [2605]
Rectangle is Sum of Square and Rectangle
Proof (related to "Rectangle is Sum of Square and Rectangle") [2560]
Rectangles Contained by Proportional Straight Lines
Proof (related to "Rectangles Contained by Proportional Straight Lines") [2464]
Rectangles Contained by Three Proportional Straight Lines
Proof (related to "Rectangles Contained by Three Proportional Straight Lines") [2465]
Recursive Formula for Binomial Coefficients
Proof (related to "Recursive Formula for Binomial Coefficients") [995]
Relation of Ratios to Products‎
Proof (related to "Relation of Ratios to Products‎") [2500]
Relationship Between the Greatest Common Divisor and the Least Common Multiple
Proof (related to "Relationship Between the Greatest Common Divisor and the Least Common Multiple") [1282]
Relative Lengths of Chords of Circles‎
Proof (related to "Relative Lengths of Chords of Circles‎") [2385]
Relative Lengths of Lines Inside Circle
Proof (related to "Relative Lengths of Lines Inside Circle") [2377]
Relative Lengths of Lines Outside Circle
Proof (related to "Relative Lengths of Lines Outside Circle") [2378]
Relative Sizes of Angles in Segments
Proof (related to "Relative Sizes of Angles in Segments") [2401]
Relative Sizes of Components of Ratios
Proof (related to "Relative Sizes of Components of Ratios") [2437]
Relative Sizes of Elements in Perturbed Proportion
Proof (related to "Relative Sizes of Elements in Perturbed Proportion") [2444]
Relative Sizes of Magnitudes on Unequal Ratios
Proof (related to "Relative Sizes of Magnitudes on Unequal Ratios") [2433]
Relative Sizes of Proportional Magnitudes
Proof (related to "Relative Sizes of Proportional Magnitudes") [2436]
Relative Sizes of Ratios on Unequal Magnitudes
Proof (related to "Relative Sizes of Ratios on Unequal Magnitudes") [2431]
Relative Sizes of Successive Ratios
Proof (related to "Relative Sizes of Successive Ratios") [2443]
Replacing Mutually Independent Events by Their Complements
Proof (related to "Replacing Mutually Independent Events by Their Complements") [1811]
Representing Real Cosine by Complex Exponential Function
Proof (related to "Representing Real Cosine by Complex Exponential Function") [1787]
Representing Real Sine by Complex Exponential Function
Proof (related to "Representing Real Sine by Complex Exponential Function") [1789]
Riemann Integral for Step Functions
Proof (related to "Riemann Integral for Step Functions") [1753]
Riemann Upper and Riemann Lower Integrals for Bounded Real Functions
Proof (related to "Riemann Upper and Riemann Lower Integrals for Bounded Real Functions") [1762]
Right Angle to Tangent of Circle goes through Center
Proof (related to "Right Angle to Tangent of Circle goes through Center") [2389]
Right-Distributivity Law For Natural Numbers
Proof (related to "Right-Distributivity Law For Natural Numbers") [1437]
Root of Area contained by Rational Straight Line and Fifth Binomial
Proof (related to "Root of Area contained by Rational Straight Line and Fifth Binomial") [2639]
Root of Area contained by Rational Straight Line and First Binomial
Proof (related to "Root of Area contained by Rational Straight Line and First Binomial") [2635]
Root of Area contained by Rational Straight Line and Fourth Binomial
Proof (related to "Root of Area contained by Rational Straight Line and Fourth Binomial") [2638]
Root of Area contained by Rational Straight Line and Second Binomial
Proof (related to "Root of Area contained by Rational Straight Line and Second Binomial") [2636]
Root of Area contained by Rational Straight Line and Sixth Binomial
Proof (related to "Root of Area contained by Rational Straight Line and Sixth Binomial") [2640]
Root of Area contained by Rational Straight Line and Third Binomial
Proof (related to "Root of Area contained by Rational Straight Line and Third Binomial") [2637]
Rule of Combining Different Sets of Indices
Proof (related to "Rule of Combining Different Sets of Indices") [1120]
Rules of Calculation with Inequalities
Elementary Proof (related to "Rules of Calculation with Inequalities") [595]
Second Apotome of Medial is Irrational
Proof (related to "Second Apotome of Medial is Irrational") [2656]
Second Bimedial is Irrational
Proof (related to "Second Bimedial is Irrational") [2619]
Second Bimedial Straight Line is Divisible Uniquely
Proof (related to "Second Bimedial Straight Line is Divisible Uniquely") [2625]
Segment Commensurable with Medial Segment is Medial
Proof (related to "Segment Commensurable with Medial Segment is Medial") [2604]
Segment on Given Base Unique
Proof (related to "Segment on Given Base Unique") [2393]
Segments of Rational Straight Line cut in Extreme and Mean Ratio are Apotome
Proof (related to "Segments of Rational Straight Line cut in Extreme and Mean Ratio are Apotome") [2760]
Side of Area Contained by Rational Straight Line and Fifth Apotome
Proof (related to "Side of Area Contained by Rational Straight Line and Fifth Apotome") [2676]
Side of Area Contained by Rational Straight Line and First Apotome
Proof (related to "Side of Area Contained by Rational Straight Line and First Apotome") [2672]
Side of Area Contained by Rational Straight Line and Fourth Apotome
Proof (related to "Side of Area Contained by Rational Straight Line and Fourth Apotome") [2675]
Side of Area Contained by Rational Straight Line and Second Apotome
Proof (related to "Side of Area Contained by Rational Straight Line and Second Apotome") [2673]
Side of Area Contained by Rational Straight Line and Sixth Apotome
Proof (related to "Side of Area Contained by Rational Straight Line and Sixth Apotome") [2677]
Side of Area Contained by Rational Straight Line and Third Apotome
Proof (related to "Side of Area Contained by Rational Straight Line and Third Apotome") [2674]
Side of Hexagon Inscribed in a Circle Equals the Radius of that Circle
Proof (related to "Side of Hexagon Inscribed in a Circle Equals the Radius of that Circle") [2422]
Side of Rational Plus Medial Area is Divisible Uniquely
Proof (related to "Side of Rational Plus Medial Area is Divisible Uniquely") [2627]
Side of Rational plus Medial Area is Irrational
Proof (related to "Side of Rational plus Medial Area is Irrational") [2621]
Side of Regular Pentagon inscribed in Circle with Rational Diameter is Minor
Proof (related to "Side of Regular Pentagon inscribed in Circle with Rational Diameter is Minor") [2765]
Side of Remaining Area from Rational Area from which Medial Area Subtracted
Proof (related to "Side of Remaining Area from Rational Area from which Medial Area Subtracted") [2689]
Side of Sum of Medial Areas is Irrational
Proof (related to "Side of Sum of Medial Areas is Irrational") [2622]
Side of Sum of Two Medial Areas is Divisible Uniquely
Proof (related to "Side of Sum of Two Medial Areas is Divisible Uniquely") [2628]
Sides Appended of Hexagon and Decagon inscribed in same Circle are cut in Extreme and Mean Ratio
Proof (related to "Sides Appended of Hexagon and Decagon inscribed in same Circle are cut in Extreme and Mean Ratio") [2763]
Sides of Equal and Equiangular Parallelograms are Reciprocally Proportional‎
Proof (related to "Sides of Equal and Equiangular Parallelograms are Reciprocally Proportional‎") [2462]
Sides of Equiangular Triangles are Reciprocally Proportional
Proof (related to "Sides of Equiangular Triangles are Reciprocally Proportional") [2463]
Similar Figures on Proportional Straight Lines
Proof (related to "Similar Figures on Proportional Straight Lines") [2470]
Similar Figures on Sides of Right-Angled Triangle
Proof (related to "Similar Figures on Sides of Right-Angled Triangle") [2479]
Similar Parallelogram on Half a Straight Line
Proof (related to "Similar Parallelogram on Half a Straight Line") [2475]
Similar Plane Numbers have Same Ratio as between Two Squares
Proof (related to "Similar Plane Numbers have Same Ratio as between Two Squares") [2545]
Similar Polygons are Composed of Similar Triangles
Proof (related to "Similar Polygons are Composed of Similar Triangles") [2468]
Similar Segments on Equal Bases are Equal
Proof (related to "Similar Segments on Equal Bases are Equal") [2394]
Similar Solid Numbers have Same Ratio as between Two Cubes
Proof (related to "Similar Solid Numbers have Same Ratio as between Two Cubes") [2546]
Similarity of Polygons is Equivalence‎ Relation
Proof (related to "Similarity of Polygons is Equivalence‎ Relation") [2469]
Simple Binomial Identities
Proof (related to "Simple Binomial Identities") [1840]
Simulating LOOP Programs Using WHILE Programs
Proof (related to "Simulating LOOP Programs Using WHILE Programs") [1200]
Sizes of Pyramids of Same Height with Polygonal Bases are as Bases
Proof (related to "Sizes of Pyramids of Same Height with Polygonal Bases are as Bases") [2742]
Sizes of Tetrahedra of Same Height are as Bases
Proof (related to "Sizes of Tetrahedra of Same Height are as Bases") [2741]
Solid Angle contained by Plane Angles is Less than Four Right Angles
Proof (related to "Solid Angle contained by Plane Angles is Less than Four Right Angles") [2717]
Square is Sum of Two Rectangles
Proof (related to "Square is Sum of Two Rectangles") [2511]
Square of Coprime Number is Coprime
Proof (related to "Square of Coprime Number is Coprime") [2506]
Square of Cube Number is Cube
Proof (related to "Square of Cube Number is Cube") [2549]
Square on Apotome applied to Rational Straight Line
Proof (related to "Square on Apotome applied to Rational Straight Line") [2678]
Square on Binomial Straight Line applied to Rational Straight Line
Proof (related to "Square on Binomial Straight Line applied to Rational Straight Line") [2641]
Square on First Apotome of Medial Straight Line applied to Rational Straight Line
Proof (related to "Square on First Apotome of Medial Straight Line applied to Rational Straight Line") [2679]
Square on First Bimedial Straight Line applied to Rational Straight Line
Proof (related to "Square on First Bimedial Straight Line applied to Rational Straight Line") [2642]
Square on Major Straight Line applied to Rational Straight Line
Proof (related to "Square on Major Straight Line applied to Rational Straight Line") [2644]
Square on Medial Straight Line
Proof (related to "Square on Medial Straight Line") [2603]
Square on Minor Straight Line applied to Rational Straight Line
Proof (related to "Square on Minor Straight Line applied to Rational Straight Line") [2681]
Square on Rational Straight Line applied to Apotome
Proof (related to "Square on Rational Straight Line applied to Apotome") [2694]
Square on Rational Straight Line applied to Binomial Straight Line
Proof (related to "Square on Rational Straight Line applied to Binomial Straight Line") [2693]
Square on Second Apotome of Medial Straight Line applied to Rational Straight Line
Proof (related to "Square on Second Apotome of Medial Straight Line applied to Rational Straight Line") [2680]
Square on Second Bimedial Straight Line applied to Rational Straight Line
Proof (related to "Square on Second Bimedial Straight Line applied to Rational Straight Line") [2643]
Square on Side of Equilateral Triangle inscribed in Circle is Triple Square on Radius of Circle
Proof (related to "Square on Side of Equilateral Triangle inscribed in Circle is Triple Square on Radius of Circle") [2766]
Square on Side of Rational plus Medial Area applied to Rational Straight Line
Proof (related to "Square on Side of Rational plus Medial Area applied to Rational Straight Line") [2645]
Square on Side of Regular Pentagon inscribed in Circle equals Squares on Sides of Hexagon and Decagon inscribed in same Circle
Proof (related to "Square on Side of Regular Pentagon inscribed in Circle equals Squares on Sides of Hexagon and Decagon inscribed in same Circle") [2764]
Square on Side of Sum of two Medial Area applied to Rational Straight Line
Proof (related to "Square on Side of Sum of two Medial Area applied to Rational Straight Line") [2646]
Square on Straight Line which produces Medial Whole with Medial Area applied to Rational Straight Line
Proof (related to "Square on Straight Line which produces Medial Whole with Medial Area applied to Rational Straight Line") [2683]
Square on Straight Line which produces Medial Whole with Rational Area applied to Rational Straight Line
Proof (related to "Square on Straight Line which produces Medial Whole with Rational Area applied to Rational Straight Line") [2682]
Square Roots
Proof (related to "Square Roots") [1162]
Straight Line cannot be in Two Planes
Proof (related to "Straight Line cannot be in Two Planes") [2697]
Straight Line Commensurable with Apotome
Proof (related to "Straight Line Commensurable with Apotome") [2684]
Straight Line Commensurable with Apotome of Medial Straight Line
Proof (related to "Straight Line Commensurable with Apotome of Medial Straight Line") [2685]
Straight Line Commensurable with Bimedial Straight Line is Bimedial and of Same Order
Proof (related to "Straight Line Commensurable with Bimedial Straight Line is Bimedial and of Same Order") [2648]
Straight Line Commensurable with Binomial Straight Line is Binomial and of Same Order
Proof (related to "Straight Line Commensurable with Binomial Straight Line is Binomial and of Same Order") [2647]
Straight Line Commensurable with Major Straight Line is Major
Proof (related to "Straight Line Commensurable with Major Straight Line is Major") [2649]
Straight Line Commensurable with Minor Straight Line
Proof (related to "Straight Line Commensurable with Minor Straight Line") [2686]
Straight Line Commensurable with Side of Rational plus Medial Area
Proof (related to "Straight Line Commensurable with Side of Rational plus Medial Area") [2650]
Straight Line Commensurable with Side of Sum of two Medial Areas
Proof (related to "Straight Line Commensurable with Side of Sum of two Medial Areas") [2651]
Straight Line Commensurable with that which produces Medial Whole with Medial Area
Proof (related to "Straight Line Commensurable with that which produces Medial Whole with Medial Area") [2688]
Straight Line Commensurable with that which produces Medial Whole with Rational Area
Proof (related to "Straight Line Commensurable with that which produces Medial Whole with Rational Area") [2687]
Straight Line cut in Extreme and Mean Ratio plus its Greater Segment
Proof (related to "Straight Line cut in Extreme and Mean Ratio plus its Greater Segment") [2759]
Straight Line Perpendicular to Plane from Point is Unique
Proof (related to "Straight Line Perpendicular to Plane from Point is Unique") [2709]
Straight Lines cut in Same Ratio by Parallel Planes
Proof (related to "Straight Lines cut in Same Ratio by Parallel Planes") [2713]
Straight Lines Cut Off Equal Arcs in Equal Circles
Proof (related to "Straight Lines Cut Off Equal Arcs in Equal Circles") [2398]
Straight Lines Subtending Two Consecutive Angles in Regular Pentagon cut in Extreme and Mean Ratio
Proof (related to "Straight Lines Subtending Two Consecutive Angles in Regular Pentagon cut in Extreme and Mean Ratio") [2762]
Subgroups of Cyclic Groups
Proof (related to "Subgroups of Cyclic Groups") [820]
Subgroups of Finite Cyclic Groups
Proof (related to "Subgroups of Finite Cyclic Groups") [826]
Subsets of Finite Sets
Proof (related to "Subsets of Finite Sets") [987]
Subtraction of Divisors obeys Distributive Law
Proof (related to "Subtraction of Divisors obeys Distributive Law") [2488]
Subtraction of Multiples of Divisors obeys Distributive Law
Proof (related to "Subtraction of Multiples of Divisors obeys Distributive Law") [2489]
Successor of Oridinal
Proof (related to "Successor of Oridinal") [775]
Sufficient Condition for Coprimality
Proof (related to "Sufficient Condition for Coprimality") [2482]
Sum Of Angles in a Triangle and Exterior Angle
Geometric Proof (related to "Sum Of Angles in a Triangle and Exterior Angle") [925]
Sum of Antecedent and Consequent of Proportion
Proof (related to "Sum of Antecedent and Consequent of Proportion") [2448]
Sum of Antecedents of Proportion
Proof (related to "Sum of Antecedents of Proportion") [2447]
Sum of Arithmetic Progression
Proof (related to "Sum of Arithmetic Progression") [1118]
Sum of Binomial Coefficients
Proof (related to "Sum of Binomial Coefficients") [1406]
Sum of Binomial Coefficients I
Proof (related to "Sum of Binomial Coefficients I") [1842]
Sum of Binomial Coefficients II
Proof (related to "Sum of Binomial Coefficients II") [1844]
Sum of Components of Equal Ratios
Proof (related to "Sum of Components of Equal Ratios") [2435]
Sum of Convergent Complex Sequences
Proof (related to "Sum of Convergent Complex Sequences") [1712]
Sum of Convergent Real Sequences
Proof (related to "Sum of Convergent Real Sequences") [1132]
Sum of Even Number of Odd Numbers is Even
Proof (related to "Sum of Even Number of Odd Numbers is Even") [2567]
Sum of Even Numbers is Even
Proof (related to "Sum of Even Numbers is Even") [2566]
Sum of Geometric Progression
Proof (related to "Sum of Geometric Progression") [1124]
Sum of Odd Number of Odd Numbers is Odd
Proof (related to "Sum of Odd Number of Odd Numbers is Odd") [2568]
Sum of Pair of Elements of Geometric Progression with Three Elements in Lowest Terms is Coprime to other Element
Proof (related to "Sum of Pair of Elements of Geometric Progression with Three Elements in Lowest Terms is Coprime to other Element") [2561]
Sum of Plane Angles Used to Construct a Solid Angle is Less Than Four Right Angles
Proof (related to "Sum of Plane Angles Used to Construct a Solid Angle is Less Than Four Right Angles") [2719]
Sum of Rational Area and Medial Area gives rise to four Irrational Straight Lines
Proof (related to "Sum of Rational Area and Medial Area gives rise to four Irrational Straight Lines") [2652]
Sum of Two Angles of Three containing Solid Angle is Greater than Other Angle
Proof (related to "Sum of Two Angles of Three containing Solid Angle is Greater than Other Angle") [2716]
Sum of two Incommensurable Medial Areas give rise to two Irrational Straight Lines
Proof (related to "Sum of two Incommensurable Medial Areas give rise to two Irrational Straight Lines") [2653]
Summing Areas or Rectangles
Proof (related to "Summing Areas or Rectangles") [1016]
Summing of Areas of Rectangles (II)
Geometric Proof (related to "Summing of Areas of Rectangles (II)") [1018]
Supremum Property, Infimum Property
Proof of Existence (related to "Supremum Property, Infimum Property") [1757]
Tangent Secant Theorem
Proof (related to "Tangent Secant Theorem") [2406]
Tetrahedra are Equal iff Bases are Reciprocally Proportional to Heights
Proof (related to "Tetrahedra are Equal iff Bases are Reciprocally Proportional to Heights") [2745]
Tetrahedron divided into Two Similar Tetrahedra and Two Equal Prisms
Proof (related to "Tetrahedron divided into Two Similar Tetrahedra and Two Equal Prisms") [2739]
That which produces Medial Whole with Medial Area is Irrational
Proof (related to "That which produces Medial Whole with Medial Area is Irrational") [2659]
That which produces Medial Whole with Rational Area is Irrational
Proof (related to "That which produces Medial Whole with Rational Area is Irrational") [2658]
The "Angle-Side-Angle" and "Angle-Angle-Side" Theorems for the Congruence of Triangles
Geometric Proof (related to "The "Angle-Side-Angle" and "Angle-Angle-Side" Theorems for the Congruence of Triangles") [906]
The "Side-Angle-Side" Theorem for the Congruence of Triangle
Geometric Proof (related to "The "Side-Angle-Side" Theorem for the Congruence of Triangle") [739]
The "Side-Side-Side" Theorem for the Congruence of Triangles
Proof by Contradiction (related to "The "Side-Side-Side" Theorem for the Congruence of Triangles") [754]
The absolute value makes the set of rational numbers a metric space.
Direct Proof (related to "The absolute value makes the set of rational numbers a metric space.") [1091]
The Converse of the Pythagorean Theorem
Geometric Proof (related to "The Converse of the Pythagorean Theorem") [972]
The distance of complex numbers makes complex numbers a metric space.
Proof (related to "The distance of complex numbers makes complex numbers a metric space.") [1734]
The distance of real numbers makes real numbers a metric space.
Direct Proof (related to "The distance of real numbers makes real numbers a metric space.") [620]
The Exterior Angle Is Greater Than Either of the Non-Adjacent Interior Angles
Geometric Proof (related to "The Exterior Angle Is Greater Than Either of the Non-Adjacent Interior Angles") [785]
The Fundamental Counting Principle
Proof (related to "The Fundamental Counting Principle") [992]
The General Perturbation Method
Proof (related to "The General Perturbation Method") [1122]
The Proving Principle by Contradiction
Proof (related to "The Proving Principle by Contradiction") [745]
The Proving Principle By Contraposition
Proof (related to "The Proving Principle By Contraposition") [1331]
The Proving Principle of Complete Induction (Variant 1)
Direct Proof (related to "The Proving Principle of Complete Induction (Variant 1)") [658]
The Pythagorean Theorem
Geometric Proof (related to "The Pythagorean Theorem") [969]
Geometric Proof (related to "The Pythagorean Theorem") [970]
The set of WHILE-computable functions is included in the set of partially WHILE-computable functions
Proof (related to "The set of WHILE-computable functions is included in the set of partially WHILE-computable functions") [1198]
The Sum of the Lengths of Any Pair of Sides of a Triangle (Triangle Inequality)
Geometric Proof (related to "The Sum of the Lengths of Any Pair of Sides of a Triangle (Triangle Inequality)") [878]
The Sum of Two Angles of a Triangle
Geometric Proof (related to "The Sum of Two Angles of a Triangle") [790]
The supplemental angle of a right angle is another right angle.
Direct Proof (related to "The supplemental angle of a right angle is another right angle.") [655]
Theorem of Even Perfect Numbers (first part)
Proof (related to "Theorem of Even Perfect Numbers (first part)") [2581]
Theorem of Large Numbers for Relative Frequencies
Proof (related to "Theorem of Large Numbers for Relative Frequencies") [1848]
Three Intersecting Lines Perpendicular to Another Line are in One Plane
Proof (related to "Three Intersecting Lines Perpendicular to Another Line are in One Plane") [2701]
Time Dilation, Lorentz Factor
Proof (related to "Time Dilation, Lorentz Factor") [6298]
Touching Circles have Different Centers
Proof (related to "Touching Circles have Different Centers") [2376]
Transitivity of Parallel Lines
Proof (related to "Transitivity of Parallel Lines") [920]
Transitivity of the Order Relation of Natural Numbers
Proof (related to "Transitivity of the Order Relation of Natural Numbers") [1550]
Triangle Inequality
Proof (related to "Triangle Inequality") [1088]
Triangles of Equal Area I
Geometric Proof (related to "Triangles of Equal Area I") [948]
Triangles of Equal Area II
Geometric Proof (related to "Triangles of Equal Area II") [950]
Triangles of Equal Area III
Geometric Proof (related to "Triangles of Equal Area III") [952]
Triangles of Equal Area IV
Geometric Proof (related to "Triangles of Equal Area IV") [954]
Triangles with One Equal Angle and Two Other Sides Proportional are Similar
Proof (related to "Triangles with One Equal Angle and Two Other Sides Proportional are Similar") [2455]
Triangles with One Equal Angle and Two Sides Proportional are Similar
Proof (related to "Triangles with One Equal Angle and Two Sides Proportional are Similar") [2454]
Triangles with Proportional Sides are Similar
Proof (related to "Triangles with Proportional Sides are Similar") [2453]
Triangles with Two Sides Parallel and Equal
Proof (related to "Triangles with Two Sides Parallel and Equal") [2480]
Triangles within Triangles
Geometric Proof (related to "Triangles within Triangles") [894]
Trichotomy of Ordinals
Proof (related to "Trichotomy of Ordinals") [731]
Trichotomy of the Order Relation for Natural Numbers
Proof (related to "Trichotomy of the Order Relation for Natural Numbers") [1553]
Two Circles have at most Two Points of Intersection
Proof (related to "Two Circles have at most Two Points of Intersection") [2380]
Two Coprime Integers have no Third Integer Proportional
Proof (related to "Two Coprime Integers have no Third Integer Proportional") [2562]
Two Intersecting Straight Lines are in One Plane
Proof (related to "Two Intersecting Straight Lines are in One Plane") [2698]
Two Irrational Straight Lines arising from Medial Area from which Medial Area Subtracted
Proof (related to "Two Irrational Straight Lines arising from Medial Area from which Medial Area Subtracted") [2691]
Two Irrational Straight Lines arising from Medial Area from which Rational Area Subtracted
Proof (related to "Two Irrational Straight Lines arising from Medial Area from which Rational Area Subtracted") [2690]
Two Lines Meeting which are Parallel to Two Other Lines Meeting contain Equal Angles
Proof (related to "Two Lines Meeting which are Parallel to Two Other Lines Meeting contain Equal Angles") [2706]
Two Lines Perpendicular to Same Plane are Parallel
Proof (related to "Two Lines Perpendicular to Same Plane are Parallel") [2702]
Union of Countable Many Countable Sets
Proof (related to "Union of Countable Many Countable Sets") [797]
Unique Solvability of \(a+x=b\)
Elementary Proof (related to "Unique Solvability of \(a+x=b\)") [518]
Unique Solvability of \(ax=b\)
Elementary Proof (related to "Unique Solvability of \(ax=b\)") [519]
Uniqueness Lemma of a Finite Basis
Proof by Contradiction (related to "Uniqueness Lemma of a Finite Basis") [1040]
Uniqueness of 1
Elementary Proof of Uniqueness (related to "Uniqueness of 1") [49]
Uniqueness of Complex Zero
Proof (related to "Uniqueness of Complex Zero") [1687]
Uniqueness of Integer Zero
Proof (related to "Uniqueness of Integer Zero") [1683]
Uniqueness of Natural Zero
Proof (related to "Uniqueness of Natural Zero") [1681]
Uniqueness of Negative Numbers
Elementary Proof of Uniqueness (related to "Uniqueness of Negative Numbers") [60]
Uniqueness Of Predecessors Of Natural Numbers
Proof (related to "Uniqueness Of Predecessors Of Natural Numbers") [1543]
Uniqueness of Rational Zero
Proof (related to "Uniqueness of Rational Zero") [1685]
Uniqueness of Real Zero
Elementary Proof of Uniqueness (related to "Uniqueness of Real Zero") [44]
Uniqueness of Reciprocal Numbers
Elementary Proof of Uniqueness (related to "Uniqueness of Reciprocal Numbers") [61]
Uniqueness of the Limit of a Sequence
Proof (related to "Uniqueness of the Limit of a Sequence") [1130]
Uniqueness of Triangles
Proof by Contradiction (related to "Uniqueness of Triangles") [752]
Unit Circle
Proof (related to "Unit Circle") [1750]
Unit Ring of All Rational Cauchy Sequences
Proof (related to "Unit Ring of All Rational Cauchy Sequences") [1104]
Urn Model With Replacement
Proof (related to "Urn Model With Replacement") [1800]
Urn Model Without Replacement
Proof (related to "Urn Model Without Replacement") [1798]
Volume of Cone is Third of Cylinder on Same Base and of Same Height
Proof (related to "Volume of Cone is Third of Cylinder on Same Base and of Same Height") [2746]
Volume of Cones or Cylinders of Same Height are in Same Ratio as Bases
Proof (related to "Volume of Cones or Cylinders of Same Height are in Same Ratio as Bases") [2747]
Volumes of Cones or Cylinders on Equal Bases are in Same Ratio as Heights
Proof (related to "Volumes of Cones or Cylinders on Equal Bases are in Same Ratio as Heights") [2750]
Volumes of Parts of Cylinder cut by Plane Parallel to Opposite Planes are as Parts of Axis
Proof (related to "Volumes of Parts of Cylinder cut by Plane Parallel to Opposite Planes are as Parts of Axis") [2749]
Volumes of Similar Cones and Cylinders are in Triplicate Ratio of Diameters of Bases
Proof (related to "Volumes of Similar Cones and Cylinders are in Triplicate Ratio of Diameters of Bases") [2748]
Volumes of Similar Parallelepipeds are in Triplicate Ratio to Length of Corresponding Sides
Proof (related to "Volumes of Similar Parallelepipeds are in Triplicate Ratio to Length of Corresponding Sides") [2730]
Volumes of Similar Tetrahedra are in Triplicate Ratio of Corresponding Sides
Proof (related to "Volumes of Similar Tetrahedra are in Triplicate Ratio of Corresponding Sides") [2744]
Volumes of Spheres are in Triplicate Ratio of Diameters
Proof (related to "Volumes of Spheres are in Triplicate Ratio of Diameters") [2754]
Well-Ordering Principle
Proof (related to "Well-Ordering Principle") [699]
When is it possible to find a separating cycle in a biconnected graph, given a non-separating cycle?
Proof (related to "When is it possible to find a separating cycle in a biconnected graph, given a non-separating cycle?") [1234]

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