中科院数学与系统科学研究院
数学研究所
学术报告会
报告人： Prof. Phùng Hô Hai (Institute of Mathematics Vietnam Academy of Science and Technology)
题 目：On the structure of flat group schemes over a Dedekind ring
时 间：2016.05.20（星期五），15 :00-16 :00
地 点：数学院南楼N820室
Abstract:
We study affine group schemes over a discrete valuation ring R using two techniques: Neron blowups and Tannakian categories. We employ the theory developed to define and study differential Galois groups of integrable connections on a scheme over a DVR. This throws light on how differential Galois groups of families degenerate.