Mathematics Colloquium (No. 955): Associate Professor Zhong Changlong on Motivic Chern Classes
It is reported that the Institute of Mathematics will host the 955th session of the “Toward Modern Mathematics” colloquium on July 6, featuring Associate Professor Zhong Changlong from the State University of New York at Albany as the speaker.
Talk Details
| Item | Details |
|---|---|
| Title | Motivic Chern classes of open projected Richardson varieties and of affine Schubert cells |
| Speaker | Associate Professor Zhong Changlong (SUNY Albany) |
| Host | Associate Professor Wu Enxin |
| Time | July 6, 2026, 15:00 |
| Venue | Donghai’an Campus, Room D-Shi 209 |
Abstract
Open projected Richardson varieties are indexed by pairs of Weyl group elements (u,w) with u ≤ w and w a minimal length representative. It is known that there is an embedding of these elements into the extended affine Weyl group, and there is also a geometric isomorphism behind this combinatorial construction. One can then consider the cohomology/K-theory classes. For example, He-Lam proved that the cohomology/K-theory classes of closed projected Richardson varieties coincide with opposite Schubert classes in the affine Grassmannian, and Fan-Guo-Su-Xiong proved that the Segre-MacPherson classes of open projected Richardson varieties coincide with Segre-MacPherson classes of opposite Schubert cells. This talk will discuss the generalization of these results into motivic Chern classes.
About the Speaker
Zhong Changlong received his PhD from the University of Southern California in 2011. His research focuses on the algebraic cohomology theory of flag varieties and its connections with Schubert calculus and representation theory. He has published 27 papers in professional academic journals including Compos. Math., Adv. Math., J. Inst. Math. Jussieu, and Math. Z.
Source: STU OA Notice (Institute of Mathematics)