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Gilles Personne de Roberval

b. Senlis, France 10 August 1602
d. Paris, France 27 October 1675

Little is known of the early life of Roberval. In 1628 he arrived in Paris and put himself in contact with the members of Mersenne's circle. He became professor of philosphy at the Collège de Maître Gervais in 1632. On 24 June 1634 Roberval acquired the Ramus chair at the Collège Royal in Paris and in 1655 also succeeded to the chair of mathematics. He studied the geometry of infinitesimals. Roberval was one of the charter members of the Académie des Sciences in Paris which was founded in 1666.