English

Langlands Classification for L-Parameters

Representation Theory 2014-07-25 v1

Abstract

Let FF be a non-archimedean local field and G=G(F)G={\bf{G}}(F) the group of FF-rational points of a connected reductive FF-group. Then we have the Langlands classification of complex irreducible admissible representations π\pi of GG in terms of triples (P,σ,ν)(P,\sigma,\nu) where PGP\subset G is a standard FF-parabolic subgroup, σ\sigma is an irreducible tempered representation of the standard Levi-group MPM_P and νRX(MP)\nu \in \Bbb{R}\otimes X^*(M_P) is regular with respect to P.P. Now we consider Langlands' L-parameters [ϕ][\phi] which conjecturally will serve as a system of parameters for the representations π\pi and which are (roughly speaking) equivalence classes of representations ϕ\phi of the absolute Galois group Γ=Gal(FF)\Gamma=\text{Gal}(\overline{F}|F) with image in Langlands' L-group LG\,^LG, and we classify the possible [ϕ][\phi] in terms of triples (P,[tϕ],ν)(P,[\,^t\phi],\nu) where the data (P,ν)(P,\nu) are the same as in the Langlands classification of representations and where [tϕ][\,^t\phi] is a tempered L-parameter of MP.M_P.

Keywords

Cite

@article{arxiv.1407.6494,
  title  = {Langlands Classification for L-Parameters},
  author = {Allan J. Silberger and Ernst-Wilhelm Zink},
  journal= {arXiv preprint arXiv:1407.6494},
  year   = {2014}
}

Comments

39 pages

R2 v1 2026-06-22T05:11:57.273Z