Career
He was a student of Jacob Palis at Instituto Nacional de Matemática Pura e Aplicada. He was an invited speaker at the ICMs of 1983 and 1994. "On the dimension of the compact invariant sets of certain non-linear maps", Springer, Lectures "An ergodic closing lemma", Annals of Mathematics Second Series, Scient. l"Ecolc Normale Superíeure "A proof of the C1 stability conjecture", Publications Mathématiques de l"IHÉSouth, 66, pp. Journal of Differential Geometry, 45 (1997), northern