Special values of adjoint L-functions and congruences for automorphic forms on GL(n) over a number field
Number Theory
2014-10-28 v2
Abstract
We prove an integrality result for the value at s=1 of the adjoint L-function associated to a cohomological cuspidal automorphic representation on GL(n) over any number field. We then show that primes (outside an exceptional set) dividing this special value give rise to congruences between automorphic forms. We also prove a non-vanishing property at infinity for the relevant Rankin-Selberg L-functions on GL(n) x GL(n).
Keywords
Cite
@article{arxiv.1408.3896,
title = {Special values of adjoint L-functions and congruences for automorphic forms on GL(n) over a number field},
author = {Baskar Balasubramanyam and A. Raghuram},
journal= {arXiv preprint arXiv:1408.3896},
year = {2014}
}
Comments
26 pages. Section 5 on non-vanishing at infinity has been substantially revised. Minor changes in other sections based on feedback