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Jean le Rond d'Alembert

Jean-Baptiste le Rond d'Alembert
Alembert.jpg
Jean-Baptiste le Rond d'Alembert, pastel by Maurice Quentin de La Tour
Born (1717-11-16)16 November 1717
Paris, France
Died 29 October 1783(1783-10-29) (aged 65)
Paris, France
Nationality French
Fields Mathematics
Mechanics
Physics
Philosophy
Alma mater University of Paris
Notable students Pierre-Simon Laplace
Known for D'Alembert criterion
D'Alembert force
D'Alembert's form of the principle of virtual work
D'Alembert's formula
D'Alembert equation
D'Alembert operator
D'Alembert's paradox
D'Alembert's principle
D'Alembert system
D'Alembert–Euler condition
Tree of Diderot and d'Alembert
Cauchy–Riemann equations
Fluid mechanics
Encyclopédie
Three-body problem
Notable awards Fellow of the Royal Society
Follow of the Institut de France

Jean-Baptiste le Rond d'Alembert (/ˌdæləmˈbɛər/;French: [ʒɑ̃ batist lə ʁɔ̃ dalɑ̃bɛːʁ]; 16 November 1717 – 29 October 1783) was a French mathematician, mechanician, physicist, philosopher, and music theorist. Until 1759 he was also co-editor with Denis Diderot of the Encyclopédie. D'Alembert's formula for obtaining solutions to the wave equation is named after him. The wave equation is sometimes referred to as d'Alembert's equation.

Born in Paris, d'Alembert was the natural son of the writer Claudine Guérin de Tencin and the chevalier Louis-Camus Destouches, an artillery officer. Destouches was abroad at the time of d'Alembert's birth. Days after birth his mother left him on the steps of the Saint-Jean-le-Rond de Paris () church. According to custom, he was named after the patron saint of the church. D'Alembert was placed in an orphanage for foundling children, but his father found him and placed him with the wife of a glazier, Madame Rousseau, with whom he lived for nearly 50 years. Destouches secretly paid for the education of Jean le Rond, but did not want his paternity officially recognized.


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