晨兴学术报告：Unramified cohomology and descent methods to weak approximation

Speaker: Prof. Yang Cao (Shandong University) 

Time: 10:30-11:30am, December 26, 2023 (Tuesday)

Place: MCM110 & Online (Zoom ID: 3329836068  Password: mcm1234)

Title: Unramified cohomology and descent methods to weak approximation

Abstract: On one hand, the unramified cohomology is stably birational invariant and provides a criterion for rationality; on the other hand, weak approximation of algebraic varieties (the density of rational points in local points) is also stably birational invariant, and one of its basic tools is Colliot-Thélène and Sansuc's descent methods. In this talk, I will try to use unramified cohomology to construct new descent methods.