Born in Grasse on May 3 1928. Died May 17 2001.
Education and professional career
- 1947-1950 : Student at the École Normale Supérieure
- 1950-1951 : Agrégé préparateur at E.N.S.
- 1951-1954 : Research associate at C.N.R.S.
- 1954-1963 : Senior Lecturer, then Professor at the Nancy Faculty of Science
- 1963-1972 : Professor, Faculty of Science, Paris
- 1973-1998 : Professor at the Collège de France in the Mathematical Analysis of Systems and their Control Department
- 1973 : Member of the Institut (Académie des Sciences)
- 1966-1986 : Professor at École Polytechnique. Honorary Professor from 1986
- 1980-1984 : Chairman of I.N.R.I.A. (Institut National de Recherches en Informatique et en Automatique)
- 1984-1992 : Chairman of C.N.E.S. (Centre National d'Études Spatiales)
- 1986-1992 : Chairman of the Scientific Council of Électricité de France
- 1990 : Chairman of the Comité Scientifique de la Météorologie Nationale since October
- 1991-2000 : Member of the Scientific Council of Pechiney
- 1992 : Scientific Advisor to E.L.F
- 1992 : Senior Scientific Advisor, Dassault-Aviation
- 1993 : Member of the Scientific Advisory Board, Gaz de France
- 1992-1996 : Scientific Advisor to the CEO of E.D.F.
- 1995-1996 : Vice-President of the Paris Academy of Sciences
- 1996-1998 : President of the French Academy of Sciences
- 1996 : Member of the Franco-Japanese Dialogue Forum
- 1998 : Chairman of the Scientific Council of France Telecom
- 2000 : Chairman of the Medals Committee of the European Mathematical Society. Barcelona Congress
