Jean-François Le Gall

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Jean-François Le Gall (right) at the ICM 2006 in Madrid , with Hans Föllmer

Jean-François Le Gall (born November 15, 1959 in Morlaix ) is a French mathematician who deals with probability theory.

Live and act

Le Gall studied from 1978 to 1982 at the École normal supérieure (ENS). In 1982 he received his doctorate from the University of Pierre and Marie Curie (Univ. Paris VI) with Marc Yor ( Local times and stochastic differential equations ) and in 1987 he completed his habilitation there ( Some properties of Brownian motion ). From 1983 he was a scientist (Chargé de Recherche) of the CNRS at the University of Pierre and Marie Curie, where he became professor in 1988. At the same time he was a professor at the ENS from 1997 to 2007. Since 2006 he has been a professor at the University of Paris-South in Orsay.

Le Gall investigated problems of Brownian motion . For example, he introduced the concept of Brownian snake (Brownian Snake) into the theory of "super-Brownian motion", a kind of nonlinear Brownian motion. He generalized a theorem by Aryeh Dvoretzky , Shizuo Kakutani and Paul Erdős about the multiple points of Brownian paths in the plane (namely, that there are points in the plane to which the Brownian motion returns uncountably many times).

In 1986 he received the Rollo Davidson Prize and in 1997 the Loève Prize . From 1991 to 1996 he was a member of the Institut universitaire de France , and since 2007 he has been a senior member. In 2005 he received the Fermat Prize and the Grand Prix Sophie Germain of the Académie des sciences . In 1998 he was invited speaker at the International Congress of Mathematicians (ICM) in Berlin ( branching processes, random trees and super processes ) and in 1992 and 2008 at the European Congress of Mathematicians (2008 with the plenary lecture The continuous limit of large random planar maps , 1992 with the lecture A path-valued Markov process and its connection with partial differential equations ). In 2013 he was elected to the Académie des Sciences. He was selected as plenary speaker at the International Congress of Mathematicians 2014 in Seoul (Random geometry on the sphere). For 2019 he received the Wolf Prize for Mathematics.

Fields medal winner Wendelin Werner is one of his doctoral students .

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Individual evidence

  1. Wolf Prize 2019