Seminar series
Date
Tue, 14 Nov 2017
Time
15:45 -
16:45
Location
L4
Speaker
Sven Meinhardt
Organisation
Sheffield
I will introduce a cohomology theory which combines topological and algebraic concepts. Interpretations of certain cohomology groups will be given. We also generalise the construction of the second Stiefel-Whitney class of a line bundle. As I will explain in my talk, the refined Stiefel-Whitney class of the canonical bundle on certain moduli stacks provides an obstruction for the construction of cohomological Hall algebras.