Étienne Ghys (born 29 December 1954) is a French mathematician. His research focuses mainly on geometry and dynamical systems, though his mathematical interests are broad. He also expresses much interest in the historical development of mathematical ideas, especially the contributions of Henri Poincaré.
Alumnus of the École normale supérieure de Saint-Cloud, he is currently a CNRS "directeur de recherche" at the École normale supérieure in Lyon. He is also editor-in-chief of the Publications Mathématiques de l'IHÉS and a member of the French Academy of Sciences.
In 2015, he was awarded the inaugural Clay Award for Dissemination of Mathematical Knowledge.
- Étienne Ghys at the Mathematics Genealogy Project
- Homepage at the UMPA
- « Notice sur les travaux scientifiques d'Étienne Ghys », an overview of his mathematical interests and results, written for his entry at the French Academy of Sciences.
- Homepage of the movie Dimensions
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