The open book BookofProofs (thereafter the "open book") is a collection of mathematical theories and proofs provided to the public for educational purposes.
The open book is run non-commercially.
The open book comes "as is" with absolutely no warranty.
All parts of the open book 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 open book subject to the respective copyleft and/or copyright stated in each of its parts.