English

Kisin modules with descent data and parahoric local models

Number Theory 2018-01-15 v2

Abstract

We construct a moduli space Yμ,τY^{\mu, \tau} of Kisin modules with tame descent datum τ\tau and with fixed pp-adic Hodge type μ\leq \mu, for some finite extension K/QpK/\mathbb{Q}_p. We show that this space is smoothly equivalent to the local model for ResK/QpGLn\mathrm{Res}_{K/\mathbb{Q}_p} \mathrm{GL}_n, cocharacter {μ}\{ \mu \}, and parahoric level structure. We use this to construct the analogue of Kottwitz-Rapoport strata on the special fiber Yμ,τY^{\mu, \tau} indexed by the μ\mu-admissible set. We also relate Yμ,τY^{\mu, \tau} to potentially crystalline Galois deformation rings.

Cite

@article{arxiv.1510.07503,
  title  = {Kisin modules with descent data and parahoric local models},
  author = {Ana Caraiani and Brandon Levin},
  journal= {arXiv preprint arXiv:1510.07503},
  year   = {2018}
}

Comments

38 pages, final version, to appear in Ann. Sci. de l'ENS

R2 v1 2026-06-22T11:28:59.197Z