Jean Écalle
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French mathematician
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Mathematics
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(Suggest an Edit or Addition)According to Wikipedia, Jean Écalle is a French mathematician, specializing in dynamic systems, perturbation theory, and analysis. Écalle received, in 1974 from the University of Paris-Saclay in Orsay, a doctorate under the supervision of Hubert Delange with Thèse d'État entitled La théorie des invariants holomorphes. He is a directeur de recherche of the Centre national de la recherche scientifique and is a professor at the University of Paris-Saclay.