(Latest revision as of 1 October 2018)
The catalog is a collection of mathematical theories and proofs provided to the public for educational purposes.
The catalog is run non-commercially.
The catalog comes "as is" with absolutely no warranty.
All parts of the catalog are subject to copyleft and/or copyright. The parts might be in different formats (e.g. web-based or PDF-documents). You are allowed to use the catalog subject to the respective copyleft and/or copyright stated in each of its parts.