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Number Theory Lunch Seminar
Number Theory Lunch Seminar
Counting torsion 2 dimensional sheaves in CY3 and modular forms
Counting torsion 2 dimensional sheaves in CY3 and modular forms
Organizers
Speaker
Time
Thursday, May 21, 2026 12:15 PM - 1:00 PM
Venue
A4-1
Abstract
There is a conjecture by physicists that counting of torsion sheaves with 2 dimensional support deforming in ambient Calabi Yau threefold is governed by modular form partition functions. I will discuss some of the results I have had in this direction during the past 15 years.
Speaker Intro
Artan Sheshmani is a Professor of pure Mathematics, specialized in Algebraic geometry, Enumerative and Derived Geometry, and Mathematics of String Theory. He joined BIMSA as a Professor in September 2023. Prior to BIMSA he was a senior personnel at Simons Collaboration Program on Homological Mirror Symmetry at Harvard University Center for Mathematical Sciences and Applications (CMSA) for 7 years, during a portion of which he was jointly an Associate Professor of Mathematics at Institut for Mathematik (formerly the Center for Quantum Geometry of Moduli Spaces) at Aarhus University in Denmark (2016-2022). He is working on geometry of moduli spaces of sheaves and curves from enumerative geometry point of view as well as studying their structural properties from derived geometry and geometric representation theory point of view.