English

De Rham $F$-gauges and Shimura varieties

Algebraic Geometry 2025-09-16 v3 Number Theory

Abstract

We study FF-gauges for de Rham cohomology of smooth algebraic varieties in characteristic pp. Applying to good reductions of Shimura varieties of Hodge type, we recover the Ekedahl-Oort stratifications by constructing universal de Rham FF-gauges with GG-structure. We also study the cohomology of de Rham FF-gauges on these varieties. In particular, in the PEL type case and when the weights of the flat automorphic vector bundles are pp-small, we determine the FF-gauge structure on their de Rham cohomology by the associated dual BGG complexes.

Keywords

Cite

@article{arxiv.2403.01899,
  title  = {De Rham $F$-gauges and Shimura varieties},
  author = {Xu Shen},
  journal= {arXiv preprint arXiv:2403.01899},
  year   = {2025}
}

Comments

42 pages; accepted version

R2 v1 2026-06-28T15:08:10.649Z