English

Distinguished Simple Supercuspidal Representations of $p$-adic $\text{GL}(n)$

Representation Theory 2026-04-17 v1 Number Theory

Abstract

Let E/F\text{E}/\text{F} be a quadratic extension of non-Archimedean local fields with odd residual characteristic. In this paper, we give equivalent conditions for a simple supercuspidal representation π\pi of GL(n,E)\text{GL}(n, \text{E}) to be distinguished by GL(n,F)\text{GL}(n, \text{F}) in terms of its defining maximal simple type and twisted gamma factors. Furthermore, we prove that the collection of twisted gamma factors evaluated at 12\frac{1}{2} between π\pi and all unitary, tamely ramified quasi-characters of E×\text{E}^{\times} that are trivial on F×\text{F}^{\times} is sufficient to determine whether π\pi is distinguished by GL(n,F)\text{GL}(n, \text{F}).

Keywords

Cite

@article{arxiv.2604.15057,
  title  = {Distinguished Simple Supercuspidal Representations of $p$-adic $\text{GL}(n)$},
  author = {David C. Luo},
  journal= {arXiv preprint arXiv:2604.15057},
  year   = {2026}
}

Comments

13 pages

R2 v1 2026-07-01T12:12:44.154Z