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Texas A&M University
Mathematics

Topology Seminar

Date: October 14, 2020

Time: 4:00PM - 5:00PM

Location: Zoom

Speaker: Shaoyun Bai, Princeton University

  

Title: Equivariant Cerf theory and SU(n) Casson invariants

Abstract: I will present joint work with Boyu Zhang on defining perturbative SU(n)-Casson invariant for integer homology 3-spheres. Ideas from the studies of J-holomorphic curves in symplectic manifolds play important roles in the construction, in particular issues related to equivariant transversalities. Time permitting, I will discuss about possible generalizations and topological applications. Video recording available at https://tamu.zoom.us/rec/share/GoNJG5eazmSjWS8r3p_eXLSjQ48Zr90BerbhmecnJal8jCO1Dd84e1-wIjTYE-gm.5eOBWKDp_eiopFPR (Access Password: u5d2W?mS)