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The \mu-ordinary locus for Shimura varieties of Hodge type

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arxiv 1310.6444 v1 pith:7ASSAB2B submitted 2013-10-24 math.AG math.NTmath.RT

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keywords locusmu-ordinaryekedahl-oorthodgeresultsshimurastratificationtype
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We review the Newton stratification and Ekedahl-Oort stratification on the special fiber of a smooth integral model for a Shimura variety of Hodge type at a prime of good reduction. We show that the \mu-ordinary locus coincides with the generic Ekedahl-Oort stratum, and that for any two geometric points in the \mu-ordinary locus there is an isomorphism of the attached Dieudonne modules with additional structure. As a consequence, we proof that the \mu-ordinary locus is open and dense, thus generalizing the results which were already known in the PEL-case. To prove our results we provide a method which allows to reduce the equality of strata to a group theoretic statement.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. $p$-adic Maass--Shimura operators on $\mu$-ordinary Igusa varieties

    math.NT 2026-07 accept novelty 7.0 of 10

    The authors construct a canonical formal group action on μ-ordinary Igusa varieties for Hodge type Shimura data that integrates Maass-Shimura operators and, via p-adic Fourier theory, yields a unified algebra action e...

  2. Ekedahl-Oort strata under natural embeddings of orthogonal and unitary Shimura varieties

    math.NT 2026-05 unverdicted novelty 4.0 of 10

    Determines the Ekedahl-Oort strata containing images under natural embeddings of orthogonal and unitary Shimura varieties and computes their discrete invariants.

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