Event time:
Tuesday, December 6, 2022 - 4:30pm
Speaker:
Yuri Tschinkel
Speaker affiliation:
Simons Foundation & NYU
Event description:
Abstract: The classification of finite groups and their regular actions on projective spaces have occupied generations of mathematicians. Actions on fields, especially, within the framework of Galois theory, are also of major interest. Recently, there have been interesting developments concerning the classification of actions on function fields of algebraic varieties. New techniques, based on ideas of motivic integration, led to the introduction of new invariants of such actions. I will discuss their construction and geometric applications (joint work with B. Hassett and A. Kresch).