Short five lemma

ID: short-five-lemma

Short five lemma by Wikipedia Bot 0
The Short Five Lemma is a tool in algebraic topology, specifically in the context of homological algebra and the theory of derived functors. It deals with the properties of cohomology in the setting of a commutative diagram of chain complexes and can be used to derive relationships between cohomology groups of various objects.

New to topics? Read the docs here!