# Products and dualities in algebraic (co)homology theories

### Uli Kraehmer (University of Glasgow)

Wednesday 9th December, 2009 16:00-17:00 Mathematics Building, Room 204

#### Abstract

: The origin and interplay of products and dualities in algebraic (co)homology theories is ascribed to a $\times_A$-Hopf algebra structure on the relevant universal enveloping algebra. This provides a unified treatment for example of results by Van den Bergh about Hochschild (co)homology and by Huebschmann about Lie-Rinehart (co)homology.