Charles Dupin Le baron Pierre Charles FranГ§ois Dupin est un mathГ©maticien, ingГ©nieur et homme politique franГ§ais nГ© Г Varzy (N вЂ¦ WikipГ©dia en FranГ§aisД¬harles-AndrГ© Dupin - Mandats dГ©putГ© de la LГ©gislative (1791 92)В dГ©putГ© au Conseil des Anciens sous le Directoire, puis au Corps lГ©gislatif sous le Consulat.

Dupin war der Sohn eines Anwalts und wuchs in вЂ¦ Deutsch WikipediaД¬harles Dupin - Pour les articles homonymes, voir Dupin. Januar 1873 in Paris) war ein franzГ¶sischer Mathematiker, Ingenieur und Politiker. Entry in MacTutor History of MathematicsД¬harles Dupin - Charles Dupin, Lithografie von Julien LГ©opold Boilly Pierre Charles FranГ§ois Dupin (* 6.Entry in New Catholic Dictionary (1910).He was the discoverer of conjugate tangents to a point on a surface and of the Dupin indicatrix. His mathematical work was in descriptive and differential geometry. In addition, he had a political career and was appointed to the Senate in 1852. In 1826 he published a thematic map showing the distribution of illiteracy in France, using shadings (from black to white), the first known instance of what is called a choropleth map today. In 1822, he was elected a foreign member of the Royal Swedish Academy of Sciences. In 1819 he was appointed professor at the Conservatoire des Arts et MГ©tiers he kept this post until 1854. He studied geometry with Monge at the Г‰cole Polytechnique and then became a naval engineer. Pierre Charles FranГ§ois Dupin (Octoin Varzy, NiГЁvre вЂ“ Januin Paris, France) was a French Catholic mathematician.

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