Jean Nicolas Pierre Hachette

Jean Nicolas Pierre Hachette was a French mathematician, born at Mézières on 6 May 1769, where his father was a bookseller, and dead on 16 January 1834. He studied at the colleges of Charleville and Reims and in 1788 returned to Mézières as draughtsman to the physics and chemistry professors of the school of engineering. In 1793 he became professor of hydrography at Collioure and Port-Vendres, and sent Gaspard Monge papers treating navigation questions geometrically. When the École polytechnique was established in 1794 he was appointed with Monge over the department of descriptive geometry, where he taught Poisson, Arago and Fresnel. He was expelled from his chair in 1816 but kept a professorship at the École normale until his death, and royal assent for his election to the Académie des Sciences was refused in 1823.