English

De Rham comparison and Poincar\'e duality for rigid varieties

Algebraic Geometry 2022-11-01 v2 Number Theory

Abstract

Over any smooth algebraic variety over a pp-adic local field kk, we construct the de Rham comparison isomorphisms for the \'etale cohomology with partial compact support of de Rham Zp\mathbb Z_p-local systems, and show that they are compatible with Poincar\'e duality and with the canonical morphisms among such cohomology. We deduce these results from their analogues for rigid analytic varieties that are Zariski open in some proper smooth rigid analytic varieties over kk. In particular, we prove finiteness of \'etale cohomology with partial compact support of any Zp\mathbb Z_p-local systems, and establish the Poincar\'e duality for such cohomology after inverting pp.

Keywords

Cite

@article{arxiv.1912.13030,
  title  = {De Rham comparison and Poincar\'e duality for rigid varieties},
  author = {Kai-Wen Lan and Ruochuan Liu and Xinwen Zhu},
  journal= {arXiv preprint arXiv:1912.13030},
  year   = {2022}
}

Comments

61 pages. Final version. To appear in Peking Mathematical Journal

R2 v1 2026-06-23T12:59:10.283Z