Geometric Representation Theory

Event Information Monodromic model for Khovanov-Rozansky homology
13:30 on Friday February 26, 2021
14:30 on Friday February 26, 2021
Virtual
Kostya Tolmachov

University of Toronto

Khovanov-Rozansky homology is a knot invariant which, by the result of Khovanov, can be computed as the Hochschild cohomology functor applied to Rouquier complexes of Soergel bimodules. I will describe a new geometric model for the Hochschild cohomology of Soergel bimodules, living in the monodromic Hecke category. I will also explain how it allows to identify objects representing individual Hochsсhild cohomology groups as images of explicit character sheaves. Based on the joint work with Roman Bezrukavnikov.