English

Higher displays arising from filtered de Rham-Witt complexes

Algebraic Geometry 2020-06-25 v2 Number Theory

Abstract

For a smooth projective scheme XX over a ring RR on which pp is nilpotent that meets some general assumptions we prove that the crystalline cohomology is equipped with the structure of a higher display which is a relative version of Fontaine's strongly divisible lattices. Frobenius-divisibilty is induced by the Nygaard filtration on the relative de Rham-Witt complex. For a nilpotent PD-thickening S/RS/R we also consider the associated relative display and can describe it explicitly by a relative version of the Nygaard filtration on the de Rham-Witt complex associated to a lifting of XX over SS. We prove that there is a crystal of relative displays if moreover the mod pp reduction of XX has a smooth and versal deformation space.

Keywords

Cite

@article{arxiv.1711.09940,
  title  = {Higher displays arising from filtered de Rham-Witt complexes},
  author = {Oliver Gregory and Andreas Langer},
  journal= {arXiv preprint arXiv:1711.09940},
  year   = {2020}
}

Comments

19 pages

R2 v1 2026-06-22T22:58:30.803Z