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：申  旭  (中国科学院数学与系统科学研究院)

题  目：Local and global geometric structures of perfectoid Shimura varieties

时  间：2016.06.08（星期三），16:30--17:30

地  点：晨兴数学中心610室

Abstract:

In this talk, we will investigate some geometric structural properties of perfectoid Shimura varieties of abelian type. In the global part, we will construct some minimal and toroidal type compactifications for these spaces, and we will describe explicitly the degeneration of Hodge-Tate period map at the boundaries. In the local part, we will show that each Newton stratum of these perfectoid Shimura varieties can be described by the related (generalized) Rapoport-Zink space and Igusa variety. As a consequence of our local and global constructions, we can compute the stalks of the relative cohomology under the Hodge-Tate period map of the intersection complex (on the minimal compactification), in terms of cohomology of Igusa varieties at the boundary with truncated coefficients.