Vanishing Fourier Coefficients of Hecke Eigenforms
arXiv:2003.07570
Abstract
We prove that, for fixed tame level (N,p) = 1, there are only finitely many Hecke eigenforms f of level Gamma_1(N) and even weight with a_p(f) = 0 which are not CM.
The exposition has been considerably expanded, but the results remain unchanged