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$(φ,τ)$-modules différentiels et représentations potentiellement semi-stables

Published 4 Dec 2019 in math.NT | (1912.02104v1)

Abstract: Soit $K$ un corps $p$-adique et soit $V$ une repr\'esentation $p$-adique de $\mathcal{G}K = \mathrm{Gal}(\bar{K}/K)$. La surconvergence des $(\phi,\tau)$-modules nous permet d'attacher `a $V$ un $\phi$-module diff\'erentiel `a connexion $D{\tau,\mathrm{rig}}\dagger(V)$ sur l'anneau de Robba $\mathbf{B}{\tau,\mathrm{rig},K}\dagger$. On montre dans cet article comment retrouver les invariants $D{\mathrm{cris}}(V)$ et $D_{\mathrm{st}}(V)$ `a partir de $D_{\tau,\mathrm{rig}}\dagger(V)$, et comment caract\'eriser les repr\'esentations potentiellement semi-stables, ainsi que celles de $E$-hauteur finie, `a partir de la connexion. Let $K$ be a $p$-adic field and let $V$ be a $p$-adic representation of $\mathcal{G}K=\mathrm{Gal}(\bar{K}/K)$. The overconvergence of $(\phi,\tau)$-modules allows us to attach to $V$ a differential $\phi$-module $D{\tau,\mathrm{rig}}\dagger(V)$ on the Robba ring $\mathbf{B}{\tau,\mathrm{rig},K}\dagger$ that comes equipped with a connection. We show in this paper how to recover the invariants $D{\mathrm{cris}}(V)$ and $D_{\mathrm{st}}(V)$ from $D_{\tau,\mathrm{rig}}\dagger(V)$, and give a characterization of both potentially semi-stable representations of $\mathcal{G}_K$ and finite $E$-height representations in terms of the connection operator.

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