Comparing Hecke eigenvalues for pairs of automorphic representations for GL(2)
Number Theory
2026-04-16 v3
Abstract
We consider a variant of the strong multiplicity one theorem. Let and be two unitary cuspidal automorphic representations for that are not twist-equivalent. We find a lower bound for the lower Dirichlet density of the set of places for which , where is the trace of Langlands conjugacy class of at . One consequence of this result is an improvement on the existing bound on the lower Dirichlet density of the set of places for which .
Cite
@article{arxiv.2408.01643,
title = {Comparing Hecke eigenvalues for pairs of automorphic representations for GL(2)},
author = {Kin Ming Tsang},
journal= {arXiv preprint arXiv:2408.01643},
year = {2026}
}
Comments
Revised version