Pythagoras (581-497 B.C.)

Greek philosopher and mathematician; held that numbers were basic to matter; the Pythagorean Theorem is named for his geometric formulation; developed atomic theory; students of his philosophy emphasized geometrical form as a basic property of atoms; developed mathematical relationships which led to musical harmony.

530BC Devised Pythagoras′ theorem.

See also: Pythagoras Theorem, Pythagorean Triangle, Pythagorean Triple.