Deligne-Lusztig varieties and basic EKOR strata
Abstract
Under the axiom of He and Rapoport for the stratifications of Shimura varieties, we explain a result of G\"ortz, 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 G\"ortz and Yu for the supersingular Kottwitz-Rapoport strata and to the descriptions of Harashita, Hoeve for the supersingular Ekedahl-Oort strata.
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