Life and work Charles Dupin

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1826 choropleth map of france.


in 1826 published thematic map showing distribution of illiteracy in france, using shadings (from black white), first known instance of called choropleth map today. duplin had been inspired work of german statisticians georg hassel , august friedrich wilhelm crome. dupin named rapporteur central jury of 1834 exposition des produits de l industrie française. each branch of industry noted quantities , value of french exports , imports, comparative figures 1823, 1827 , 1834.


in addition, had political career , appointed senate in 1852. mathematical work in descriptive , differential geometry. discoverer of conjugate tangents point on surface , of dupin indicatrix.








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