Born on June 29, 1951 in Heidelberg. Degrees in mathematics und physics at MIT (1968), D.Phil. Oxford Univ. (1972), German Habilitation Bonn Univ. (1975), Associate Professor Bonn Univ. (1976), Chair Professor of Number Theory Univ. of Maryland (1979-1990), Professor Univ. of Utrecht (1990), Scientific Member (since 1984) and Director (since 1995) at the Max Planck Institute for Mathematics. Professeur, Collège de France, Paris (since 2000).