Raggio, G.A. 1986 Scholar; 1987-89 Assistant Professor Born 1951 Buenos Aires, Argentina. Dr. Sc. Nat. 1981 ETH. Appointments: Prof., Cordoba 1989-. Memberships: American Physical Society; American Mathematical Society.Address: Facultad de Matematica, Astronomia y Fisica, Universidad Nacional de Cordoba, Ciudad Universitaria, 5000 Cordoba, Argentina. E-mail: raggio_at_famaf.edu.ar