Speaker: Li Youlin, Professor, Shanghai Jiao Tong University

Date: May 18, 2026

Time: 10:00-11:00 am

Location: B1044, Zhixin Building, Shandong University

Sponsor: School of Mathematics, Shandong University

Abstract:

In this talk, we study solid tori in contact three-manifolds. Specifically, we study the contact width of a knot type and give criteria for when it can be explicitly computed. We also prove there are many non-thickenable tori in many knot types. These tori are frequently essential in the study of Legendrian and transverse knot theory and tight contact structures on manifolds obtained by surgery on the knot. This is joint work with John Etnyre and Bulent Tosun.

For more information, please visit:

https://www.view.sdu.edu.cn/info/1020/212278.htm