Dear all historians, I happen to have in hands an interesting mathematical book (the Port-Royal Geometry) whose binding bears the (heraldic) arms of the "Grand Dauphin".
Louis de France (1661-1711), called ÃÂ³le Grand DauphinÃÂ², was Louis XIV's son. He died before he could have reigned, and it was his grandson who finally inherited the throne of France, under the name of Louis XV. All I know about Grand Dauphin's education is that it was managed by Bossuet. My question is about who (obviously not Bossuet) was in charge for teaching him enough mathematics.