English

Cohomologie des courbes analytiques $p$-adiques

Number Theory 2022-07-26 v2 Algebraic Geometry

Abstract

Cohomology of affinoids does not behave well; often, this can be remedied by making affinoids overconvergent. In this paper, we focus on dimension 1 and compute, using analogs of pants decompositions of Riemann surfaces, various cohomologies of affinoids. To give a meaning to these decompositions we modify slightly the notion of pp-adic formal scheme, which gives rise to the adoc (an interpolation between adic and ad hoc) geometry. It turns out that cohomology of affinoids (in dimension 1) is not that pathological. From this we deduce a computation of cohomologies of curves without boundary (like the Drinfeld half-plane and its coverings). In particular, we obtain a description of their pp-adic pro-\'etale cohomology in terms of de the Rham complex and the Hyodo-Kato cohomology, the later having properties similar to the ones of \ell-adic pro-\'etale cohomology, for p\ell\neq p.

Keywords

Cite

@article{arxiv.2101.06647,
  title  = {Cohomologie des courbes analytiques $p$-adiques},
  author = {Pierre Colmez and Gabriel Dospinescu and Wiesława Nizioł},
  journal= {arXiv preprint arXiv:2101.06647},
  year   = {2022}
}

Comments

Final version. Appeared in Cambridge Journal of Mathematics