Geometric Representation Theory Seminar

Organizers：

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

Speaker：

Jianrong Li (University of Vienna)

Time：

Fri., 15:30-16:30, Mar. 28, 2025

Venue：

B626, Shuangqing Complex Building A

Title:

Cluster structures on spinor helicity and momentum twistor varieties

Abstract：

We study cluster structures on spinor helicity and momentum twistor varieties which describe the kinematic spaces of massless scattering. Both varieties are certain partial flag varieties. We exhibit embeddings of the corresponding cluster algebras into cluster algebras of sufficiently large Grassmannians and show how the former is obtained by freezing certain cluster variables from the latter. This is joint work with Lara Bossinger.

Link: https://ymsc.tsinghua.edu.cn/info/1053/3211.htm