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Hall algebra approach to cohomology rings

Date: Thursday, March 21, 2019 13:30 - 15:30
Speaker: Olivier Schiffmann (Département de Mathématiques d'Orsay)
Location: Big Seminar room Ground floor / Office Bldg West (I21.EG.101)
Series: Mathematics and CS Seminar
Host: Tamas Hausel
Contact: PETZ Caroline
Lab building west seminar room

Abstract:

I will discuss an approach to compute the cohomology ring of the moduli stacks of semistable vector bundles on a curve, using cohomological Hall algebras. In particular, we describe combinatorially the COHA of coherent sheaves on a curve.
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