Pierre Dupin, French mathematician

Pierre Dupin, French mathematician

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Caption: Pierre Charles Francois Dupin (1784-1873), French mathematician. Dupin was born in Varzy, central France, and studied mathematics under Monge at the Ecole Polytechnique in Paris. While still an undergraduate he discovered Dupin cyclides, a type of torus. In 1803 he graduated and became a naval engineer although he continued his researches in topology. In 1813 he published Developments in Geometry, introducing the Dupin indicatrix that characterises the local shape of a surface. He invented the thematic, or chloropleth map when he published a map showing the distribution of illiteracy in France as shadings. In later life he was an active politician.

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Keywords: 1800s, 19th, applied, century, charles, chloropleth, cyclide, cyclides, developpements, dupin, francois, french, geometrie, geometry, history, indicatrix, map, mathematician, mathematics, maths, pierre, portrait, statistics, surface, thematic, topology, vertical, visualisation

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