A prismatic-etale comparison theorem in the semistable case

Let $K|\mathbb{Q}_p$ be a complete discrete valuation field with perfect residue field, $O_K$ be its ring of integers. Consider a semistable $p$-adic formal scheme $X$ over $\mathrm{Spf}(O_K)$ with smooth generic fiber $X_η$. Du--Liu--Moon--Shimizu showed recently that the category of analytic prismatic $F$-crystals on the absolute log prismatic site of $X$ is equivalent to the category of semistable étale $\mathbb{Z}_p$-local systems on the adic generic fiber $X_η$. In this article, we prove a comparison between the Breuil--Kisin cohomology of an analytic log prismatic $F$-crystal on $X$ and the étale cohomology of its corresponding étale $\mathbb{Z}_p$-local system. This generalizes Guo--Reneicke's prismatic--étale comparison for crystalline $\mathbb{Z}_p$-local systems to the semi-stable case

Publication Details

Journal
ArXiv.org
Published
2025-07-11
Primary Topic
Soil Mechanics and Vehicle Dynamics
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article
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A prismatic-etale comparison theorem in the semistable case

ArXiv.org
Soil Mechanics and Vehicle Dynamics
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A prismatic-etale comparison theorem in the semistable case

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Abstract

Let $K|\mathbb{Q}_p$ be a complete discrete valuation field with perfect residue field, $O_K$ be its ring of integers. Consider a semistable $p$-adic formal scheme $X$ over $\mathrm{Spf}(O_K)$ with smooth generic fiber $X_η$. Du--Liu--Moon--Shimizu showed recently that the category of analytic prismatic $F$-crystals on the absolute log prismatic site of $X$ is equivalent to the category of semistable étale $\mathbb{Z}_p$-local systems on the adic generic fiber $X_η$. In this article, we prove a comparison between the Breuil--Kisin cohomology of an analytic log prismatic $F$-crystal on $X$ and the étale cohomology of its corresponding étale $\mathbb{Z}_p$-local system. This generalizes Guo--Reneicke's prismatic--étale comparison for crystalline $\mathbb{Z}_p$-local systems to the semi-stable case

ArXiv.org
Openalex Percentile: Top 52%
Soil Mechanics and Vehicle Dynamics
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A prismatic-etale comparison theorem in the semistable case · ArXiv.org (2025) | TGRS Research Map | TGRS