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Jules Henri Poincaré (18541912)
Poincaré, Jules Henri (pwa-kä-rā’). A French mathematician; born at Nancy, April 29, 1854; died at Paris, July 17, 1912. Among his writings are: ‘New Methods of Celestial Mechanics’; (1892–99); ‘Capillarity’ (1895); ‘Science and Hypothesis’ (1902).