English

On close fields and the local Langlands correspondence

Number Theory 2024-07-10 v1 Algebraic Geometry Representation Theory

Abstract

We prove that Fargues-Scholze's semisimplified local Langlands correspondence (for quasisplit groups) with F\overline{\mathbb{F}}_\ell-coefficients is compatible with Deligne and Kazhdan's philosophy of close fields. From this, we deduce that the same holds with Q\overline{\mathbb{Q}}_\ell-coefficients after restricting to wild inertia, addressing questions of Gan-Harris-Sawin and Scholze. The proof involves constructing a moduli space of nonarchimedean local fields and then extending Fargues-Scholze's work to this context.

Keywords

Cite

@article{arxiv.2407.07063,
  title  = {On close fields and the local Langlands correspondence},
  author = {Siyan Daniel Li-Huerta},
  journal= {arXiv preprint arXiv:2407.07063},
  year   = {2024}
}

Comments

94 pages. Comments welcome!

R2 v1 2026-06-28T17:34:41.345Z