时间：2025年6月4日（星期三）14:00-15:45
地点：E10-312
主讲人: Philippe Gille, Institut Camille Jordan (Lyon)
主讲人简介: Philippe Gille is now a senior CNRS researcher at Institut Camille Jordan (Lyon). He obtained his PhD in Mathematics from the University of Orsay in 1994. He was awarded the G. de B. Robinson Award in 2015 for the paper "Octonions algebras over rings are not determined by their norms" published in the Canadian Bulletin of Mathematics.
讲座主题： Loop torsors and local-global principles
讲座摘要: Loop torsors arise from finite abelian subgroups of algebraic groups and are of special interest over Laurent polynomial rings and over localizations of a henselian regular ring. In a joint work with Parimala, we use this topic to investigate local-global principles for torsors over a semi-global field.
