He returned in 1978 as ma*tre de conf*rences to the University of Paris VII, where in 1981 he became professor extraordinarius (professeur de premi*re classe) and in 1991 professor ordinarius (professeur en classe exceptionelle). In 2012 he became professor emeritus. At the beginning of his career Chenciner worked on differential topology and its applications to dynamical systems, following the pioneering efforts of Stephen Smale, and also worked on singularity theory.
Chenciner
Stephen Smale