Noncommutative Geometry Seminar

Date: January 22, 2020

Time: 2:00PM - 3:00PM

Location: BLOC 628

Speaker: Xin Ma, SUNY Buffalo

Title: The groupoid semigroup and its application

Abstract: In this talk, I will introduce and discuss an algebraic tool called the groupoid semigroup. I will show how this semigroup help establishing the almost unperforation form for dynamical comparison. Then, I will show how it relates to the type semigroup in the ample case. Finally, I will present some result on (strongly) pure infiniteness of reduced groupoid C*-algebras.