English

$(\phi,\tau)$-modules diff\'erentiels et repr\'esentations potentiellement semi-stables

Number Theory 2019-12-05 v1

Abstract

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

Cite

@article{arxiv.1912.02104,
  title  = {$(\phi,\tau)$-modules diff\'erentiels et repr\'esentations potentiellement semi-stables},
  author = {Léo Poyeton},
  journal= {arXiv preprint arXiv:1912.02104},
  year   = {2019}
}

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in French

R2 v1 2026-06-23T12:35:53.239Z