Jean Ville, also known under the names Jean-André Ville et André Ville, born 24 June 1910 in Marseille, died 22 January 1989 in Blois, was a French mathematician. He is known for having proved an extension of von Neumman's minimax theorem, as well as contributions in the fields of statistics and economics. He was one of the pioneers of the theory of martingales. Source: Wikipedia (en)