数学与统计学院学术报告[2020] 040号

(高水平大学建设系列报告393号)

报告题目: On the S-duality conjecture of Vafa-WittenI: Virtual Signed Euler characteristic

报告人：蒋云峰 教授（堪萨斯大学）

报告时间：2020年7月8日上午9:00

直播平台及链接： 腾讯会议（会议ID：701 337 231）

报告内容：Inspired by the p-field theory in Gromov-Witten theory and cotangent theory of Costello in physics, Jiang and Thomas defined several versions of virtual signed Euler characteristics for an existing perfect obstruction theory. In the first talk I will outline the meaning of virtual signed Euler characteristics starting from the classical Euler numbers. These invariants of virtual Euler characteristics will have applications in the study of S-duality conjecture of Vafa-Witten for algebraic surfaces, which is the main topic in the second and third talk.

报告人简历：Prof. Yunfeng Jiang received his Ph.D in mathematics from University of British Columbia (UBC).  Before joining University of Kansas, he worked as a postdoc at University of Utah and Imperial College London.  His main research interests are the general area of  Algebraic Geometry and mathematics physics, especially in the area of Gromov-Witten and Donaldson-Thomas theory, with relations to birational geometry, geometric representation theory, combinatorics and mirror symmetry.

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　　　　　　　　　　　　　　　　　　　　　　　　 2020年7月6日