# nLab homological category

A category $C$ is homological if it is pointed, regular and protomodular.

Many of the standard results of classical homological algebra in abelian categories extend to homological categories: the five lemma, the nine lemma, the snake lemma, long exact sequence in homology, the Noether isomorphism theorem. There is also a version of Jordan-Hoelder theorem.

Revised on May 23, 2011 17:22:31 by Zoran Škoda (161.53.130.104)