English

Lubin-Tate theory and overconvergent Hilbert modular forms of low weight

Number Theory 2021-03-10 v3

Abstract

Let KK be a finite extension of Qp\mathbb{Q}_{p} and let Γ\Gamma be the Galois group of the cyclotomic extension of KK. Fontaine's theory gives a classification of pp-adic representations of Gal(K/K)\mathrm{Gal}\left(\overline{K}/K\right) in terms of (φ,Γ)(\varphi,\Gamma)-modules. A useful aspect of this classification is Berger's dictionary which expresses invariants coming from pp-adic Hodge theory in terms of these (φ,Γ)\left(\varphi,\Gamma\right)-modules. In this paper, we use the theory of locally analytic vectors to generalize this dictionary to the setting where Γ\Gamma is the Galois group of a Lubin-Tate extension of KK. As an application, we show that if FF is a totally real number field and vv is a place of FF lying above pp, then the pp-adic representation of Gal(Fv/Fv)\mathrm{Gal}\left(\overline{F}_{v}/F_{v}\right) associated to a finite slope overconvergent Hilbert eigenform which is FvF_{v}-analytic up to a twist is Lubin-Tate trianguline. Furthermore, we determine a triangulation in terms of a Hecke eigenvalue at vv. This generalizes results in the case F=QF=\mathbb{Q} obtained previously by Chenevier, Colmez and Kisin.

Keywords

Cite

@article{arxiv.2010.14574,
  title  = {Lubin-Tate theory and overconvergent Hilbert modular forms of low weight},
  author = {Gal Porat},
  journal= {arXiv preprint arXiv:2010.14574},
  year   = {2021}
}