Parravicini, G. 1974-76 Scholar Born 1944 Bergamo, Italy. D.Sc.Phys. 1966 Pavia. Appointments: Ass. Prof., Milan 1971-82; Associate Prof., Milan 1982-. Memberships: Soc. Italiana di Fisica; International Association of Mathematical Physics.Address: Dipartimento di Fisica, University di Milano, Via Celoria 16, I-20133, Milano, Italy. E-mail: parravicini_at_mi.infn.it