Joseph Bertrand
1822–1900 (age 78)
Biography
Joseph Louis François Bertrand (French pronunciation: [ʒozɛf lwi fʁɑ̃swa bɛʁtʁɑ̃]; 11 March 1822 – 5 April 1900) was a French mathematician and historian of science whose work emphasized number theory, differential geometry, probability theory, economics and thermodynamics.
The name Bertrand's paradox, refers to various paradoxes in mathematics and economics named after him. In physics, the Bertrand's theorem for the stability of celestial orbits is named after him.