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Deligne–Lusztig varieties and basic EKOR strata
Canadian Mathematical Bulletin ( IF 0.6 ) Pub Date : 2020-06-29 , DOI: 10.4153/s0008439520000491
Haining Wang

Under the axiom of He and Rapoport for the stratifications of Shimura varieties, we explain a result of Gortz, He and Nie that the EKOR strata contained in the basic loci can be described as a disjoint union of Deligne-Lusztig varieties. In the special case of Siegel modular varieties, we compare their descriptions to that of Gortz and Yu for the supersingular Kottwitz-Rapoport strata and to the descriptions of Harashita, Hoeve for the supersingular Ekedahl-Oort strata.

中文翻译:

Deligne–Lusztig 品种和基本的 EKOR 地层

根据 He 和 Rapoport 的 Shimura 品种分层公理,我们解释了 Gortz、He 和 Nie 的结果,即基本位点中包含的 EKOR 层可以描述为 Deligne-Lusztig 品种的不相交联合。在 Siegel 模变体的特殊情况下,我们将它们的描述与 Gortz 和 Yu 对超奇异 Kottwitz-Rapoport 地层的描述以及 Harashita、Hoeve 对超奇异 Ekedahl-Oort 地层的描述进行比较。
更新日期:2020-06-29
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