One of the basic theorems in universal algebra is Birkhoff's variety theorem: the smallest equationally axiomatizable class containing a class K of algebras coincides with the class obtained by taking ...

This is a preview. Log in through your library . Journal Information The Journal of Philosophical Logic provides a forum for work at the crossroads of philosophy and logic, old and new, with ...

You don’t need a human brain to do maths — even artificial intelligence can write airtight proofs of mathematical theorems. An AI created by a team at Google has proven more than 1200 mathematical ...