*时间：2021年10月26日10:00-11:00

*地点：腾讯会议：716705858

*主讲人：Xin Ma 博士后（The University of Memphis）

*主持人：林华新  教授

*讲座内容简介：

In this talk, I will discuss two new properties for locally compact Hausdorff etale groupoids. One is from a coarse geometric view called fiberwise amenability. Another one is called almost elementariness, which is a new finite-dimensional approximation property. I will explain how these notions related to almost finiteness defined by Matui and refined by Kerr and show our almost elementariness implying tracial Z-stability of reduced groupoid C*-algebras. As an application. This implies that Matui's almost finiteness in the groupoid setting also implies Z-stability when the groupoid is minimal 2nd countable and topological amenable. This was open in general before. I will also present more applications if time permits. This is based on joint work with Jianchao Wu.

*主讲人简介：

Xin Ma于2019年在Texas A&M University获得博士学位，之后在University of Buffalo做博士后，现在是The University of Memphis大学的一名博士后研究员，他的研究方向是分析、算子代数和动力系统，已在JFA，Trans.Amer.Math.Soc.等期刊发表多篇文章。