General and Universal Algebra

This group gathers results of general and universal algebra, which study the features shared by many algebraic structures at once rather than one structure such as the group or the ring. It covers the isomorphism theorems that relate quotients and homomorphisms across groups, rings and modules, the structure of modules over principal ideal domains, and the categorical language of diagrams and equational theories. A theorem belongs here when its cited article places it in abstract algebra, universal algebra or category theory applied to algebra.