pp-adic Hodge theory in rigid analytic families

preprint2016arXivOpen access

Abstract

We study the functors $\D_{\B_\ast}(V)$, where $\B_\ast$ is one of Fontaine's period rings and VV is a family of Galois representations with coefficients in an affinoid algebra AA. We show that $\D_{\HT}(V)=\oplus_{i\in\Z}(\D_{\Sen}(V)\cdot t^i)^{Γ_K}$, $\D_{\dR}(V)=\D_{\dif}(V)^{Γ_K}$, and $\D_{\cris}(V)=\D_{\rig}(V)[1/t]^{Γ_K}$, generalizing results of Sen, Fontaine, and Berger. The modules $\D_{\HT}(V)$ and $\D_{\dR}(V)$ are coherent sheaves on $\Sp(A)$, and $\Sp(A)$ is stratified by the ranks of submodules $\D_{\HT}^{[a,b]}(V)$ and $\D_{\dR}^{[a,b]}(V)$ of "periods with Hodge-Tate weights in the interval [a,b][a,b]". Finally, we construct functorial $\B_\ast$-admissible loci in $\Sp(A)$, generalizing a result of Berger-Colmez to the case where AA is not necessarily reduced.

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