Frédéric HéleinFrédéric Hélein (born 22 April 1963) is a French mathematician. He is university professor at Paris Diderot University.
Hélein earned his doctorate at École Polytechnique under supervision of Jean-Michel Coron. In 1998 Hélein was an Invited Speaker of the International Congress of Mathematicians in Berlin. He won the 1999 Fermat Prize, jointly with Fabrice Bethuel, for several important contributions to the theory of variational calculus. Provided by Wikipedia