Ph.D. at ETH, Zürich; temporary positions at Imperial College, London, Princeton University, University of Oslo, University of Oslo, Naples, Marseille; since 1977 permanent positions in Germany, Universities of Bielefeld, Bochum and since 1979 University of Bonn.Longs stays at many univerisities in Europe, Russia, Japan, Mexico, China, USA. Max-Planck Award in Mathematics, Doctor Honoris Causa in Oslo and Stockholm, nominations per "chiara fama" at University of Rome and Trento,until retirement also Director of Mathematics at Accademia di Architettura, USI (Mendrisio) and IZKS, University of Bonn. Among the ISI Highly Cited Scientists (since 2002). Research in many areas of mathematics, pure and applied, mathematical physics, and applications of mathematics in areas like earth sciences, biology, economics, engineerings, social sciences, epistemology. Author of almost 1000 publications, including several books.