What is … Ext and its applications?
This page hosts information on Hannah Enders's talk "What is …
Ext and its applications?" at the
"What is …?" seminar. The talk will take place on Friday, July 13, 4pm at HU, RUD 25 1.023.
Abstract
From the module of homomorphisms

between two modules

and

, one can derive other modules

, for all

. These modules contain certain information about

and

. We will show how to construct

explicitly and give some further results on how to use it.