*时间：2021年12月6日13:00

*地点：腾讯会议：217 527 174

*主讲人：李一寒 博士后（南开大学）

*主持人：刘博 教授

*讲座内容简介：

In this talk，I will present a recent result on the index theorem for End-Periodic Toeplitz operators. This result can be viewed as a generalization of the theorem by Dai and Zhang for Toeplitz operators on manifolds with boundary and also an odd-dimensional analogue of the index theorem for end-periodic Dirac operators by

Mrowka-Ruberman-Saveliev. In particular，we find a new eta-type invariant in the result and we will show its relation with the eta-type invariant introduced by Dai-Zhang. The approach follows mainly the heat kernel method with a b-calculus-like modification. In the proof，we also introduce a b-eta invariant and a variation formula for it. This is a joint work with professor Guangxiang Su.

*主讲人简介：

李一寒，博士毕业于美国加利福尼亚大学圣巴巴拉分校，目前在南开大学陈省身数学研究所从事博士后研究，主要研究方向为指标理论与流形上的整体分析。