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. Duplin had been inspired by the work of the German statisticians Georg Hassel and August Friedrich Wilhelm Crome.ĭupin was named rapporteur for the central jury of the Exposition des produits de l'industrie française en 1834.įor each branch of industry he noted the quantities and value of French exports and imports, with comparative figures for 1823, 18. In 1816, after some difficulty, Charles Dupin was allowed to visit Great. 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. A Volume of plates to accompany Charles Dupins Voyages dans la Grande-Bretagne, 1824. In 1818, Dupin was elected to the body of the French Academy of Sciences, one of the Institut de France's five Academies. One of his students was Giovanni Carandino, who would go on to be the founder of the Greek Mathematics School in the 1820s. In 1808, he participated in the Greek science revival by teaching mathematics and mechanics lessons in Corfu. In 1822, he was elected a foreign member of the Royal Swedish Academy of Sciences. Charles Dupin took the surname of his adoptive parents, but his biological family were Honor Delagardie and Philippa Drummond, who were killed in an accident some years after witnessing the Wold Newton Meteorite strike. In 1819 he was appointed professor at the Conservatoire des Arts et Métiers he kept this post until 1854. In 1813 he founded the Toulon Maritime Museum. From 1807 he was responsible for the restoration of the damaged port and arsenal at Corfu.
He studied geometry with Monge at the École Polytechnique and then became a naval engineer (ENSTA). He was born in Varzy in France, the son of Charles Andre Dupin, a lawyer, and Catherine Agnes Dupin.
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