English

Mod $p$ local-global compatibility for $\mathrm{GSp}_4(\mathbb{Q}_p)$ in the ordinary case

Number Theory 2023-04-28 v4 Representation Theory

Abstract

Let FF be a totally real field of even degree in which pp splits completely. Let r:GFGSp4(Fp)\overline{r}:G_F \rightarrow \mathrm{GSp}_4(\overline{\mathbb{F}}_p) be a modular Galois representation unramified at all finite places away from pp and upper-triangular, maximally nonsplit, and of parallel weight at places dividing pp. Fix a place ww dividing pp. Assuming certain genericity conditions and Taylor--Wiles assumptions, we prove that the GSp4(Fw)\mathrm{GSp}_4(F_w)-action on the corresponding Hecke-isotypic part of the space of mod pp automorphic forms on a compact mod center form of GSp4\mathrm{GSp}_4 with infinite level at ww determines rGFw\overline{r}|_{G_{F_w}}.

Keywords

Cite

@article{arxiv.2112.12256,
  title  = {Mod $p$ local-global compatibility for $\mathrm{GSp}_4(\mathbb{Q}_p)$ in the ordinary case},
  author = {John Enns and Heejong Lee},
  journal= {arXiv preprint arXiv:2112.12256},
  year   = {2023}
}

Comments

Revised section 4.1