English

Local model of Hilbert-Siegel moduli schemes in $\Gamma_1(p)$-level

Algebraic Geometry 2021-11-03 v1 Number Theory

Abstract

We construct a local model for Hilbert-Siegel moduli schemes with Γ1(p)\Gamma_1(p)-level bad reduction over Spec Zq\text{Spec }\mathbb{Z}_{q}, where pp is a prime unramified in the totally real field and qq is the residue cardinality over pp. Our main tool is a variant over the small Zariski site of the ring-equivariant Lie complex AG_A\underline{\ell}_G^{\vee} defined by Illusie in his thesis, where AA is a commutative ring and GG is a scheme of AA-modules. We use it to calculate the Fq\mathbb{F}_{q}-equivariant Lie complex of a Raynaud group scheme, then relate the integral model and the local model.

Keywords

Cite

@article{arxiv.1902.04381,
  title  = {Local model of Hilbert-Siegel moduli schemes in $\Gamma_1(p)$-level},
  author = {Shinan Liu},
  journal= {arXiv preprint arXiv:1902.04381},
  year   = {2021}
}

Comments

40 pages; in French. Comments are welcome!