Rational analytic syntomic cohomology

Abstract

We define and study the rational analytic syntomification $X^{\mathrm{Syn}}$ of a partially proper rigid-analytic variety $X$ over ${\mathbb{Q}}_p$. We establish Poincaré duality and a theory of first Chern classes for the resulting cohomology theory, identify vector bundles on $X^{\mathrm{Syn}}$ with de Rham bundles on the Fargues--Fontaine curve of $X^{♢}$ and recover several classical comparison theorems in $p$-adic Hodge theory. We also develop analogues of our results and constructions over ${\mathbb{C}}_p$.

arXiv commentv2: Corrected the statement of Poincaré duality. 139 pages, 9 figures. Comments welcome!