一、报告题目：Almost elementary groupoids and their C*-algebras

二、报告人： 马昕 教授

三、时   间：2026年3月31日(周二)  15:00

四、地   点：闻理园 A4-305

报告摘要：In this talk, I will present some results on almost elementariness, which was introduced as a new finite approximation property for locally compact Hausdorff \'{e}tale groupoids and implies the (tracial) Z-stability for groupoid C*-algebras. I will demonstrate that for a large class C of Elliott invariants and for any unital C*-algebra A whose Elliott invariant Ell(A) in C, the C*-algebra A is classifiable if and only if A has an almost elementary groupoid model. As an application, every strongly self-absorbing C*-algebra satisfying the UCT has an almost elementary groupoid model. This is based on a joint work with Jianchao Wu.

报告人简介： 马昕，哈尔滨工业大学数学研究院教授。他于2019年在David Kerr的指导下从美国得克萨斯A&M大学获得博士学位， 随后在美国纽约州立大学布法罗分校、美国孟菲斯大学及加拿大多伦多大学从事博士后研究。 他目前的研究兴趣主要集中在动力系统、算子代数、几何群论、模型论及其与非交换几何、遍历理论、几何拓扑和描述集合论的交叉。 论文发表在《J. Funct. Anal.》《Trans. Amer. Math. Soc.》《Ergodic Theory Dynam. Systems》《Int. Math. Res. Not. IMRN》《J. London. Math. Soc.》等期刊上。

欢迎广大师生参加！联系人：51吃瓜 /数学与交叉科学研究院  李爱军