Compatibility of semisimple local Langlands parameters with parahoric Satake parameters

Abstract

In this paper, we prove that there is at most one correspondence between parahoric-spherical representations and semisimple local Langlands parameters which satisfies certain natural properties. Our proof of this uniqueness statement is very formal. In particular, the semisimple local Langlands parameters constructed by Fargues and Scholze yield the unique candidate for such representations. As a corollary, we prove a conjecture which posits the compatibility of semisimple local Langlands parameters with parahoric Satake parameters.