Mathematician:Pierre de Fermat

Fermat, Pierre de, c. 1600 - 1665

Theorems and Definitions
Famous for lots of things! Especially:
 * Fermat's Little Theorem
 * Claimed to have found a proof for what became known as Fermat's Last Theorem, but it has since been doubted that this is in fact the case (he may have been mistaken).

History

 * Born: Early 1600s, exact date unknown
 * Died: 1665