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## Definition: Disjoint Sets

Two sets are called disjoint if their intersection is empty. The Venn diagram below illustrates two disjoint sets $A$ and $B:$

### Examples

1. The set of all mammals and the set of all reptiles are disjoint.
2. The set of all stars and the set of all planets are not disjoint.

| | | | | created: 2018-12-09 17:32:53 | modified: 2018-12-09 17:33:21 | by: bookofproofs | references: [979], [7838]

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