On central leaves of Hodge-type Shimura varieties with parahoric level structure

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Kisin and Pappas (Publ Math Inst Hautes Études Sci, 2018) constructed integral models of Hodge-type Shimura varieties with parahoric level structure at p> 2 , such that the formal neighbourhood of a mod p point can be interpreted as a deformation space of p-divisible group with some Tate cycles (generalising Faltings’ construction). In this paper, we study the central leaf and the closed Newton stratum in the formal neighbourhoods of mod p points of Kisin–Pappas integral models with parahoric level structure; namely, we obtain the dimension of central leaves and the almost product structure of Newton strata. In the case of hyperspecial level structure (i.e., in the good reduction case), our main results were already obtained by Hamacher (Math Z 287(3–4):1255–1277, 2017), and we show that the result of this paper holds for ramified groups as well.
Publisher
SPRINGER HEIDELBERG
Issue Date
2019-01
Language
English
Article Type
Article
Citation

MATHEMATISCHE ZEITSCHRIFT, v.291, no.1-2, pp.329 - 363

ISSN
0025-5874
DOI
10.1007/s00209-018-2086-1
URI
http://hdl.handle.net/10203/251608
Appears in Collection
MA-Journal Papers(저널논문)
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