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 developed partial differential equation s and published findings of his research on integral calculus . He was associated with the Encyclopédie of Denis Diderot from 0441; 1746 as editor of its mathematical and scientific articles; he contributed articles on music as well, and he also published treatises on acoustics. He was elected to the Académie Française in 1754.