FTP, name this author of M?anique analytique best known for his multipliers and gravitational points.
As a young adult, he influenced the founding of the Turin Academy of Sciences and he was later director of mathematics at the Berlin Academy of Sciences.  During the French Revolution he headed a committee to come up with a new system of weights and measures.  He studied isoperimetrics, of which he formed an algorithm better than that of Euler.  FTP, name this author of M?anique analytique best known for his multipliers and gravitational points.
As a young adult, he influenced the founding of the Turin Academy of Sciences and he was later director of mathematics at the Berlin Academy of Sciences.  
Joseph-Louis Lagrange