Greek philosopher who founded a school in southern Italy that sought to discover the mathematical principles of reality through the study of musical harmony and geometry. The Pythagorean theorem is ascribed to him.
6th cent. b.c.; Gr. philosopher & mathematician, born on Samos.
Greek philosopher and mathematician who theorized that numbers constitute the essence of all natural things. He developed the Pythagorean theorem and was one of the first to apply mathematical order to observations of the stars.