English

Links between generalized Montr\'eal-functors

Number Theory 2017-07-18 v4 Representation Theory

Abstract

Let oo be the ring of integers in a finite extension K/QpK/\mathbb{Q}_p and G=G(Qp)G=\mathbf{G}(\mathbb{Q}_p) be the Qp\mathbb{Q}_p-points of a Qp\mathbb{Q}_p-split reductive group G\mathbf{G} defined over Zp\mathbb{Z}_p with connected centre and split Borel B=TN\mathbf{B}=\mathbf{TN}. We show that Breuil's pseudocompact (φ,Γ)(\varphi,\Gamma)-module Dξ(π)D^\vee_{\xi}(\pi) attached to a smooth oo-torsion representation π\pi of B=B(Qp)B=\mathbf{B}(\mathbb{Q}_p) is isomorphic to the pseudocompact completion of the basechange OEΛ(N0),DSV~(π)\mathcal{O_E}\otimes_{\Lambda(N_0),\ell}\widetilde{D_{SV}}(\pi) to Fontaine's ring (via a Whittaker functional  ⁣:N0=N(Zp)Zp\ell\colon N_0=\mathbf{N}(\mathbb{Z}_p)\to \mathbb{Z}_p) of the \'etale hull DSV~(π)\widetilde{D_{SV}}(\pi) of DSV(π)D_{SV}(\pi) defined by Schneider and Vigneras. Moreover, we construct a GG-equivariant map from the Pontryagin dual π\pi^\vee to the global sections Y(G/B)\mathfrak{Y}(G/B) of the GG-equivariant sheaf Y\mathfrak{Y} on G/BG/B attached to a noncommutative multivariable version Dξ,,(π)D^\vee_{\xi,\ell,\infty}(\pi) of Breuil's Dξ(π)D^\vee_{\xi}(\pi) whenever π\pi comes as the restriction to BB of a smooth, admissible representation of GG of finite length.

Keywords

Cite

@article{arxiv.1412.5778,
  title  = {Links between generalized Montr\'eal-functors},
  author = {Márton Erdélyi and Gergely Zábrádi},
  journal= {arXiv preprint arXiv:1412.5778},
  year   = {2017}
}

Comments

50 pp, revised

R2 v1 2026-06-22T07:36:33.236Z