Lagrange
JOSEPH LOUIS (lägrongzh'), French mathematician; born in Turin, Jan. 25, 1736. While still a youth he solved for Euler the "isoperimetrical problem"; when Euler died, he succeeded him as director of the Berlin Academy (1766), and held that office till 1787. After the death of Frederick the Great he removed to Paris; there he was lodged in the Louvre, and a pension was settled on him equal to that granted by Frederick. He remained in France during the Revolution, safeguarded by the respect felt for his learning. His greatest work is "Analytical Mechanics."
He died in Paris, April 10, 1813.