Algebra Seminar

Daniel Han, Department of Pure Mathematics, Univesity of Waterloo 

"Derived functors and (co)homology theories"

We will give an overview of derived functors and their use to form homological invariants for objects in abelian categories. Using this abstract machinery, we will give rise to group cohomology, sheaf cohomology, and others. Lastly, the Eilenberg-Watts theorem will be presented to give a loose explanation as to why many of these cohomology groups are presented as Ext groups.

MC 5479