Comultiplications on cohomological Hall algebras and vertex algebras
APA
Zhao, G. (2019). Comultiplications on cohomological Hall algebras and vertex algebras. Perimeter Institute. https://pirsa.org/19020062
MLA
Zhao, Gufang. Comultiplications on cohomological Hall algebras and vertex algebras. Perimeter Institute, Feb. 27, 2019, https://pirsa.org/19020062
BibTex
@misc{ pirsa_PIRSA:19020062, doi = {10.48660/19020062}, url = {https://pirsa.org/19020062}, author = {Zhao, Gufang}, keywords = {Mathematical physics}, language = {en}, title = {Comultiplications on cohomological Hall algebras and vertex algebras}, publisher = {Perimeter Institute}, year = {2019}, month = {feb}, note = {PIRSA:19020062 see, \url{https://pirsa.org}} }
University of Melbourne
Talk Type
Subject
Abstract
In this talk we will explore a factorization structure of the cohmological Hall algebra (COHA) of a quiver, and the occurrence of the same structure from Beilinson-Drinfeld Grassmannians. In particular, in collaboration with Mirkovic and Yang, we identified a Drinfeld-type comultiplication on the COHA with the factorizable line bundle on the zastava space. I will discuss one aspect of a recent joint work with Rapcak, Soibelman, and Yang, which can be reviewed as a construction of a vertex algebra from the standard comultiplication on the double COHA of the Jordan quiver. The standard comultiplication differs from the Drinfeld comultiplication by an S-operator. The relevant vertex algebra is the VOA at the corner of Rapcak-Gaiotto.