# D'Alembert , Jean Le Rond

*(1717–1783) French mathematician, encyclopedist, and philosopher*D'Alembert was the illegitimate son of a Parisian society hostess, Mme de Tenzin, and was abandoned on the steps of a Paris church, from which he was named. He was brought up by a glazier and his wife, and his father, the chevalier Destouches, made sufficient money available to ensure that d'Alembert received a good education although he never acknowledged that d'Alembert was his son. He graduated from Mazarin College in 1735 and was admitted to the Academy of Sciences in 1741.D'Alembert's mathematical work was chiefly in various fields of applied mathematics, in particular dynamics. In 1743 he published his*Traité de dynamique*(Treatise on Dynamics), in which the famous*d'Alembert principle*is enunciated. This principle is a generalization of Newton's third law of motion, and it states that Newton's law holds not only for fixed bodies but also for those that are free to move. D'Alembert wrote numerous other mathematical works on such subjects as fluid dynamics, the theory of winds, and the properties of vibrating strings. His most significant purely mathematical innovation was his invention and development of the theory of partial differential equations. Between 1761 and 1780 he published eight volumes of mathematical studies.Apart from his mathematical work he is perhaps more widely known for his work on Denis Diderot's*Encyclopédie*as editor of the mathematical and scientific articles, and his association with the philosophes. D'Alembert was a friend of Voltaire's and he had a lively interest in theater and music, which led him to conduct experiments on the properties of sound and to write a number of theoretical treatises on such matters as harmony. He was elected to the French Academy in 1754 and became its permanent secretary in 1772 but he refused the presidency of the Berlin Academy.

*Scientists.
Academic.
2011.*

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**Alembert , Jean Le Rond d'**— See D Alembert, Jean Le Rond … Scientists**Alembert, Jean Le Rond d'**— born , Nov. 17, 1717, Paris, France died Oct. 29, 1783, Paris French mathematician, scientist, philosopher, and writer. In 1743 he published a treatise on dynamics containing d Alembert s principle, relating to Isaac Newton s laws of motion. He… … Universalium**Alembert, Jean Le Rond d'**— (1717 1783) philosopher, writer, physicist, and mathematician A major figure of the Enlightenment, jean Le Rond d Alembert was born in paris, the natural son of the writer claudine guerin de tencin. With diderot,he was one of the authors of … France. A reference guide from Renaissance to the Present**Alembert,Jean Le Rond d'**— A·lem·bert (ăl əm bârʹ, ä läɴ bĕrʹ), Jean Le Rond d . 1717 1783. French mathematician and philosopher who wrote the influential Treatise of Dynamics (1743). He also contributed to Diderot s Encyclopédie. * * * … Universalium**D'Alembert, Jean Le Rond**— D Alembert , Jean Le Rond … Scientists**D´Alembert, Jean le Rond**— VER Alembert, Jean Baptiste le Rond d´ … Enciclopedia Universal**D’Alembert, Jean le Rond**— (1717–1783) French mathematician and philosopher. Although he achieved his distinction as a mathematician, in philosophy D’Alembert is remembered as one of the greatest figures of the French Enlightenment . Together with Diderot he was the moving … Philosophy dictionary**d’Alembert, Jean Le Rond**— (1717–1783) French mathematician … Bryson’s dictionary for writers and editors**Alembert (d’), Jean le Rond**— See Enlightenment I (The French): science, materialism and determinism … History of philosophy**Jean Le Rond D'Alembert**— D’Alembert Nom de naissance Jean le Rond d’Alembert Naissance 16 novembre 1717 Paris D … Wikipédia en Français