# Seminars & Colloquia Calendar

Geometry, Symmetry and Physics Seminar

## Building a second grading on symplectic Khovanov homology

#### Zhechi Cheng, Columbia University

Location:  Serin E372
Date & time: Thursday, 21 November 2019 at 11:00AM - 12:00PM

invariant that is conjecturally isomorphic to Khovanov homology after

collapsing two gradings by Seidel and Smith. Over characteristic 0

fields, the conjecture was proved by Abouzaid and Smith. In this talk,

I will construct a well-defined second grading on symplectic Khovanov

homology, following Abouzaid-Smith’s idea of the weight grading. I