The Congruences of Clausen- von Staudt and Kummer for Bernoulli-Hurwitz Numbers.
In this paper some properties of quadratic forms whose base points lie in the point set , the fundamental domain of the modular group, and transforming these forms into the reduced forms with the same discriminant are given.
Let be the nth normalized Fourier coefficient of a holomorphic Hecke eigenform . We establish that for j = 2,3,4, which improves the previous results. For j = 2, we even establish a better result.
We study the integral model of the Drinfeld modular curve for a prime . A function field analogue of the theory of Igusa curves is introduced to describe its reduction mod . A result describing the universal deformation ring of a pair consisting of a supersingular Drinfeld module and a point of order in terms of the Hasse invariant of that Drinfeld module is proved. We then apply Jung-Hirzebruch resolution for arithmetic surfaces to produce a regular model of which, after contractions in...