Speaker: Sayan Das (East China Normal University)
Time: 2025-11-28 14:30-15:30
Location: 1410, SIMIS
摘要：
The study of group actions on probability measure spaces occupies a central role in modern mathematics. If a group G acts on a probability measure space (X,µ), one can associate a von Neumann algebra, namely the crossed product von Neumann algebra. This von Neumann algebra naturally contains a copy of the group von Neumann algebra, denoted by L(G). A far reaching conjecture of Neshveyev and Stormer predicts that the inclusion of the group von Neumann algebra L(G) inside the group measure space construction “remembers” the group and the action. In my talk, I shall show that the conjecture is true for a large class of actions of i.c.c. groups. This talk is based on a joint work with Prof. Ionut Chifan.
About Speaker:
Professor Das is a professor at East China Normal University. He is an expert in operator algebras, with a particular focus on von Neumann algebras and subfactor theory. His research work has appeared in leading mathematical journals such as the American Journal of Mathematics, Compositio Mathematica, and the Transactions of the American Mathematical Society. Notably, he is a recipient of the prestigious National Science Fund for Excellent Young Scholars (Overseas).
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