Born and died in Paris.
D'Alembert's method for the wave equation is named after him.
See also: L'Encyclopédie
... and the average family size is 3.11. In the village the population is spread out with 27.6% under the age of 18, 6.2% from 18 to 24, 17.7% from 25 to 44, 36.0% from 45 ...