题目一：Estimates for Higher Steklov Eigenvalues

内容简介：In this talk, I will give a survey on estimates of Steklov eigenvalues. Some of our works on estimates of higher Steklov eigenvalues, especially for differential forms, will be presented.

报告人：汕头大学  余成杰  教授

题目二：On limit behavior of quasi-local mass for ellipsoids at spatial infinity

内容简介：We discuss the spatial limit of the quasi-local mass for certain ellipsoids in an asymptotically flat static spherically symmetric spacetime. These ellipsoids are not nearly round but they are of interest as an admissible parameterized foliation defining the Arnowitt-Deser-Misner (ADM) mass. The Hawking mass of this family of ellipsoids tends to infinity. In contrast, we show that the Hayward mass converges to a finite value. Moreover, a positive mass type theorem is established. The limit of the mass has a uniform positive lower bound no matter how oblate these ellipsoids are. This result could be extended for asymptotically Schwarzschild manifolds. This talk is based on a joint work with Xiaokai He and Leong-Fai Wong.

报告人：复旦大学  谢纳庆  教授

时  间：2019年11月8日（周五）晚上7：00始

地  点：南海楼三楼数学系师生研讨室

热烈欢迎广大师生参加!

信息科学技术学院

2019年11月6日