TY - JOUR ID - 2463 TI - On a Theorem of Ihara JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Rastegar, A. AD - Department of Mathematics,Sharif University of Technology Y1 - 2005 PY - 2005 VL - 12 IS - 1 SP - EP - DO - N2 - 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 UR - https://scientiairanica.sharif.edu/article_2463.html L1 - https://scientiairanica.sharif.edu/article_2463_0cf635cb77389ee21321f2d70badf604.pdf ER -