He did research at Centre National de la Recherche Scientifique, Paris, France, 1968-1971, working under the direction of Jacques-Louis Lions for his thA]se d'A(c)tat, 1971.
He taught at UniversitA(c) Paris IX-Dauphine, Paris, France, 1971-1974, at University of Wisconsin, Madison, WI, 1974-1975, at UniversitA(c) de Paris-Sud, Orsay, France, 1975-1982.
He did research at Commissariat A l'Energi...