sentences:  Between 1967 and 1969 he was a student of Karlheinz Stockhausen, György Ligeti, and Ehrhard Karkoschka at the "Internationale Ferienkurse für neue Musik" in Darmstadt .In 1977 he became a French citizen.Since 1981 he has been Professor of Philosophy, Aesthetics, and the Science of Art at the Sorbonne.