Ext Functor

Ext Functor

In mathematics, the Ext functors of homological algebra are derived functors of Hom functors. They were first used in algebraic topology, but are common in many areas of mathematics.

Read more about Ext Functor:  Definition and Computation, Construction of Ext in Abelian Categories, Further Properties of Ext, Ring Structure and Module Structure On Specific Exts, Interesting Examples