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A toroidal resolution for the bad reduction of some Shimura varieties

A. Genestier
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Abstract

Borrowing a reduction principle to a recent preprint of G. Faltings (toroidal resolution of some matrix singularities, 1999), we use Lafforgue's compactification of PGL_r^{N+1}/PGL_r to construct a canonical log-smooth toroidal resolution for the bad reduction in a prime p of Shimura varieties of unitary and symplectic type with parahoric level structures at p. Using this result, non-canonical semi-stable resolutions over Z_p[p^{1/ν}] can be derived.

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A. Genestier. 1999-12-07. A toroidal resolution for the bad reduction of some Shimura varieties. https://arxiv.org/abs/math/9912054

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