He studied at the ETH Zurich where he also did his PhD in 1967 under the direction of Res Jost (and Markus Fierz).
Assistant, Eth Zürich, 1966-1967;
lecturer, Imperial College, London, 1967-1968;
research fellow, Princeton (New Jersey) U., 1970-1972;
guest professor, U. Oslo, Norway, 1972, 74-77;
guest professor, Postgraduate School, Napoli, Italy, 1973;
guest professor, U. National Center for Scientific Research Aix Marseille, France, 1977, 87;
professor, University, Bielefeld, Germany, 1977-1979;
full professor, Ruhr-University, Bochum, Germany, since 1979. Director Sonderforschungsbereich 237 Essen-Bochum-Düsseldorf, Bochum, Germany, 1986-1989. Counsel, researcher Center for Interd.
Research U. Bielefeld, 1980-1990. Director Bibos Research Center, Bielefeld, 1986-1992.
( The Bulletin of the American Mathematical Society accla...)
Member American Mathematics Society, Norwegian Mathematics Society, German Mathematics Society.
Married Solvejg Manzoni, February 7, 1970. Children: Mielikki, Aglaja, Olivetta.