2013
DOI: 10.1007/s00229-013-0616-z
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The p-rank stratification on the Siegel moduli space with Iwahori level structure

Abstract: Our concern in this paper is to describe the p-rank statification on the Siegel moduli space with Iwahori level structure over fields of positive characteristic. We calculate the dimension of the strata and describe the closure of a given stratum in terms of p-rank strata. We also examine the relationship between the p-rank stratification and the Kottwitz-Rapoport stratification.

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Cited by 2 publications
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“…For B = Q and a complete lattice chain L, the moduli problem A specializes to the Siegel moduli space A I of principally polarized abelian varieties with Iwahori level structure. In [6], Görtz and Yu compute the dimension of the p-rank 0 locus in A I , and this computation was later generalized in [9] by Hamacher to the case of all p-rank strata. The method is the same in both cases: Determine all KR strata contained in a given p-rank stratum and compute the maximum of their dimensions.…”
Section: Introductionmentioning
confidence: 99%
“…For B = Q and a complete lattice chain L, the moduli problem A specializes to the Siegel moduli space A I of principally polarized abelian varieties with Iwahori level structure. In [6], Görtz and Yu compute the dimension of the p-rank 0 locus in A I , and this computation was later generalized in [9] by Hamacher to the case of all p-rank strata. The method is the same in both cases: Determine all KR strata contained in a given p-rank stratum and compute the maximum of their dimensions.…”
Section: Introductionmentioning
confidence: 99%