WEEKLY ACTIVITIES

An application of a Bogomolov-Gieseker type inequality to counting invariants
Speaker: Soheyla Feyzbakhsh (Imperial College)

Time: 15h15, 19/2/2021

Abstract: In this talk, I will work on a smooth projective threefold X which satisfies the Bogomolov-Gieseker conjecture of Bayer-Macr`i-Toda, such as the projective space P^3 or the quintic threefold. I will show certain moduli spaces of 2-dimensional torsion sheaves on X are smooth bundles over Hilbert schemes of ideal sheaves of curves and points in X. When X is Calabi-Yau this gives a simple wall crossing formula expressing curve counts (and so ultimately Gromov-Witten invariants) in terms of counts of D4-D2-D0 branes. This is joint work with Richard Thomas.

Join Zoom Meeting:

https://zoom.us/j/94787937855?pwd=c2FiS3VGaGowUGRpcTVoenJqZW8rQT09

Meeting ID: 947 8793 7855

Passcode: 323472

For general information of the AGEA seminar, please check out

https://sites.google.com/ncts.ntu.edu.tw/agea-seminar

or the mirror site

http://www.math.ntu.edu.tw/~jkchen/agea-seminar.html

Back

Highlights

23/04/24, Conference:
Some recent progress on selected problems in number theory
25/04/24, Conference:
Hội thảo Tối ưu và Tính toán khoa học lần thứ 22
28/05/24, Conference:
Hội nghị Đại số - Lý thuyết số - Hình hoc - Tô pô 2024
28/10/24, Conference:
School and Workshop “Selected topics in Arithmetic Algebraic Geometry”

New Scientiffic Publications