Existence of Hilbert cusp forms with non-vanishing -values
arXiv:1406.2902 · doi:10.4153/CJM-2015-048-4
Abstract
We give a derivative version of the relative trace formula on PGL(2) studied in our previous work, and obtain a formula of an average of central values (derivatives) of automorphic -functions for Hilbert cusp forms. As an application, we prove existence of Hilbert cusp forms with non-vanishing central values (derivatives) such that the absolute degrees of their Hecke fields are sufficiently large.