2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107338This is my Ph.D. thesis written under the direction of Prof. Joseph Bernstein at Tel-Aviv University. Submitted: March 2005.This is my Ph.D. thesis written under the direction of Prof. Joseph Bernstein at Tel-Aviv University (Submitted: March 2005). Among other things it also includes the first constructions of "Hecke Eigenscars"Mathematical PhysicsQuantum Physicstext