Horvath, Z. 1972-74 Scholar Born 1943 Debrecen, Hungary. Ph.D. 1971 Budapest; D.Sc. 1991 Hungary. Appointments: Assistant, Univ. of Heavy Industry, Miskolc, Hungary 1967; Senior Researcher, Eotvos Univ. 1971; Prof., Eotvos Univ. 1992-. Address: Head of Institute for Theoretical Physics, Eotvos University, H-1088 Puskin u. 5-7, Budapest, Hungary. E-mail: zalanh_at_ludens.elte.hu