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The Cech filtration and monodromy in log crystalline cohomology
Authors:Elmar Grosse-Klö  nne
Institution:Mathematisches Institut der Universität Münster, Einsteinstrasse 62, 48149 Mün- ster, Germany
Abstract:For a strictly semistable log scheme $ Y$ over a perfect field $ k$ of characteristic $ p$ we investigate the canonical Cech spectral sequence $ (C)_T$ abutting the Hyodo-Kato (log crystalline) cohomology $ H_{crys}^*(Y/T)_{\mathbb{Q}}$ of $ Y$ and beginning with the log convergent cohomology of its various component intersections $ Y^i$. We compare the filtration on $ H_{crys}^*(Y/T)_{\mathbb{Q}}$ arising from $ (C)_T$ with the monodromy operator $ N$ on $ H_{crys}^*(Y/T)_{\mathbb{Q}}$. We also express $ N$ through residue maps and study relations with singular cohomology. If $ Y$ lifts to a proper strictly semistable (formal) scheme $ X$ over a finite totally ramified extension of $ W(k)$, with generic fibre $ X_K$, we obtain results on how the simplicial structure of $ X_K^{an}$ (as analytic space) is reflected in $ H_{dR}^*(X_K)=H_{dR}^*(X_K^{an})$.

Keywords:Logarithmic crystalline cohomology  monodromy operator  weight filtration  Steenbrink complex  analytic spaces
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