%0 Journal Article
%T On a Theorem of Ihara
%J Scientia Iranica
%I Sharif University of Technology
%Z 1026-3098
%A Rastegar, A.
%D 2005
%\ 01/01/2005
%V 12
%N 1
%P -
%! On a Theorem of Ihara
%R
%X Let p be a prime number and let n be a positive integer prime to p. By an Ihara-result, one means the existence of an injection with torsion-free cokernel, from a full lattice, in the space of p-old modular forms, into a full lattice, in the space of all modular forms of level np. In this paper, Ihara-results are proven for genus two Siegel modular forms, Siegel-Jacobi forms and Hilbert modular forms. Ihara did the genus one case of elliptic modular forms [1]. A geometric formulation is proposed for the notion of
%U https://scientiairanica.sharif.edu/article_2463_0cf635cb77389ee21321f2d70badf604.pdf