Yangians from critical stable envelopes, and relation to cohomological Hall algebras

Time：Fri., 14:00-15:00, June 5, 2026

Venue：B627, Shuangqing Complex Building A

Organizer：Lin Chen, Will Donovan, Penghui Li, Peng Shan, Changjian Su, Wenbin Yan

Speaker：Yehao Zhou

Geometric Representation Theory Seminar

Organizers：

Lin Chen, Will Donovan, Penghui Li, Peng Shan, Changjian Su, Wenbin Yan

Speaker：

Yehao Zhou 周业浩 (SIMIS)

Time：

Fri., 14:00-15:00, June 5, 2026

Venue：

B627, Shuangqing Complex Building A

Title：

Yangians from critical stable envelopes, and relation to cohomological Hall algebras

Abstract:

Given a symmetric quiver Q with potential W, I will describe in this talk a construction of a (shifted) Yangian Y(Q,W) and its underlying Lie algebra g(Q,W) using the critical stable envelopes and R-matrices. I will also talk about relation between Y(Q,W) and the cohomological Hall algebra, and between g(Q,W) and the BPS Lie algebra. This is based on work 2601.01518 with Cao, Okounkov, and Zhou, and work in progress with Botta, Davison, and Zhu.

DATEJune 4, 2026

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