His political career continued and his expertise as a naval engineer clearly stood him in good stead when he was appointed as minister of maritime affairs in 1834. In 1830, at the age of 45, Dupin married Rosalie Anne Joubert. In that year he was elected as a deputy for Tarn, a département in southern France. But he not only had an academic life, publishing further important works on the applications of differential geometry to industry and the arts, but he also took a major part in politics from 1828. These lectures proved extremely popular, mainly since Dupin was an exceptional lecturer. He held this post until 1854 and he gave many public lectures on the applications of mathematics and mechanics to industry. With the reestablishment of the Académie des Sciences, Dupin was elected to that body in 1818.ĭupin was appointed professor at Conservatoire des Arts et Métiers in Paris in 1819. The year 1813 saw Dupin elected to the Institut de France, the new organisation set up to replace the Académie des Sciences after the French Revolution. Other contributions to differential geometry which occur in this work include his invention of the 'Dupin indicatrix' which gives an indication of the local behaviour of a surface up to the terms of degree two. contains many contributions to differential geometry, notably the introduction of conjugate and asymptotic lines on a surface.
In 1813 he was in Toulon, and there he set up a maritime museum which was highly influential in the way that maritime museums were organised.Īlso in 1813 Dupin published his Développments de géométrie Ⓣ ( Developments in geometry ) which :. Rather he worked on this occasion on preparing for publication the writings of a friend who had died. It took him a while to recover from the illness, but Dupin was not idle while recovering in Pisa. He was appointed as secretary to the Ionian Academy which had been founded only a short time before and he undertook deep research on mathematical topic, in particular studying the differential geometry of surfaces, and applied mechanics where he investigated the resistance of materials.Īfter three years in Corfu he set out to return to France but, while passing through Pisa, he was taken ill. While in Corfu he carried out his naval engineer's duties of repairing the port, but he also carried out tasks relating to his scientific interests. After being assigned to duties in Antwerp, Genoa and then Toulon, he was sent to Corfu in 1807 to take charge of the damaged naval arsenal there. He often went on long sea voyages which resulted in his publications being much delayed. He graduated in 1803 and then became a naval engineer. While an undergraduate he made his famous discovery of what are called today 'Dupin's cyclides' guided in this work by Monge. Charles was the middle of the three sons of his parents his older brother André also achieved fame in his profession as a lawyer.ĭupin was educated at the École Polytechnique in Paris, where he learnt geometry from Monge. Nivernais was not part of the French crown when he was born there, being owned from 1659 by Cardinal Mazarin and his descendants until 1790 when it became the département of Nièvre. Charles' father was a lawyer and Charles himself was brought up in Nivernais, the region of his birth. In fact Dupin was both her married and maiden name.
Biography Charles Dupin's father was Charles-André-Dupin and his mother was Cathérine Agnès Dupin.
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