Seminars & Colloquia Calendar

Download as iCal file

Geometry, Symmetry and Physics Seminar

Counting pointlike instantons virtually without gluing (POSTPONED)

Guangbo Xu, Texas A&M

Location:  Email organizers for zoom info
Date & time: Tuesday, 07 December 2021 at 1:00PM - 2:00PM


Abstract: In defining symplectic invariants such as Gromov-Witten invariants or Floer homology, a crucial step is the construction of the virtual fundamental cycle or the virtual fundamental chain (VFC). In this highly involved procedure, one typically needs the so-called "gluing construction" to obtain local charts. It was Tian who firstly noticed that to construct VFC in situations such as Gromov-Witten invariants, one does not necessarily need gluing. In this talk, I will review the VFC construction in Gromov-Witten theory and briefly explain Tian's idea. Then I will show how to apply this idea to define virtual counts of pointlike instantons in gauged linear sigma model. This talk is based on the joint work with Tian.


(Edit: This talk is postponed until the speaker gets over a cold.) 

Special Note to All Travelers

Directions: map and driving directions. If you need information on public transportation, you may want to check the New Jersey Transit page.

Unfortunately, cancellations do occur from time to time. Feel free to call our department: 848-445-6969 before embarking on your journey. Thank you.