Level optimization in the totally real case
arXiv:math/0602586
Abstract
In this paper, congruences between holomorphic Hilbert modular forms are studied. We show the best possible level optimization result outside l for l > 2 by solving the remaining case of Mazur principle when the degree of the totally real field is even.
This is the newest version of a preprint by the author with the same title (this paper is already submitted to a journal)