Joseph Bertrand

Joseph Bertrand
Born
Joseph Louis François Bertrand

(1822-03-11)11 March 1822
Died5 April 1900(1900-04-05) (aged 78)
Paris, France
EducationÉcole polytechnique
Known forBertrand curve
Bertrand's ballot theorem
Bertrand's box paradox
Bertrand paradox (economics)
Bertrand paradox (probability)
Bertrand's postulate
Bertrand's theorem
Bertrand–Edgeworth model
Scientific career
FieldsMathematics
InstitutionsÉcole polytechnique
Collège de France
ThesisSur la théorie des phénomènes thermo-mécaniques (1838)

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.