时间：5月28日，周三，16:00-17:00  

主题：Smooth loci of twisted affine Schubert varieties

报告人：Marc Besson (Tsinghua University 清华大学)

摘要：I will discuss some geometry of twisted affine Schubert varieties. In the untwisted case, work of Malkin, Ostrik and Vybornov, and separately work of Zhu, provide us with a good understanding of the singularities of affine Schubert varieties via level one Demazure characters. I will describe the extension of these results to the twisted case, giving us an understanding of the singularities of twisted affine Schubert varieties via twisted affine Demazure characters.