Charles Dupin

Pierre Charles François Dupin
Born(1784-10-06)6 October 1784
Varzy, France
Died18 January 1873(1873-01-18) (aged 88)
Paris, France
Known forChoropleth map
Dupin cyclide
Dupin hypersurface
Dupin indicatrix
Dupin's theorem
Malus-Dupin theorem
Scientific career
FieldsMathematics
Engineering
Economics

Baron Pierre Charles François Dupin (French pronunciation: [pjɛʁ ʃaʁl fʁɑ̃swa dypɛ̃]; 6 October 1784, Varzy, Nièvre – 18 January 1873, Paris, France) was a French Catholic mathematician, engineer, economist[1] and politician, particularly known for work in the field of mathematics, where the Dupin cyclide and Dupin indicatrix are named after him; and for his work in the field of statistical and thematic mapping.[2] In 1826 he created the earliest known choropleth map.[3]