The Jordan-Holder series for nearby cycles on some Shimura varieties and affine flag varieties

被引:14
|
作者
Goertz, Ulrich
Haines, Thomas J.
机构
[1] Univ Bonn, Inst Math, D-53115 Bonn, Germany
[2] Univ Maryland, Dept Math, College Pk, MD 20742 USA
基金
美国国家科学基金会;
关键词
D O I
10.1515/CRELLE.2007.063
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We study the Jordan-Hoder series for nearby cycles on certain Shimura varieties and Rapoport-Zink local models, and on finite-dimensional pieces of Beilinson's deformation of the affine Grassmannian to the affine flag variety (and their p-adic analogues). We give a formula for the multiplicities of irreducible constituents in terms of certain cohomology groups, and we also provide an algorithm to compute multiplicities, in terms of the affine Hecke algebra.
引用
收藏
页码:161 / 213
页数:53
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