Affine Grassmannians and the geometric Satake in mixed characteristic

preprint2016arXivOpen access

Abstract

We endow the set of lattices in Q_p^n with a reasonable algebro-geometric structure. As a result, we prove the representability of affine Grassmannians and establish the geometric Satake correspondence in mixed characteristic. We also give an application of our theory to the study of Rapoport-Zink spaces.

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