What's the difference between i.e. and e.g.?
(Pythagoras of Samos, Ionia; about 569-475 BC) The Greek mathematician who founded a philosophical and religious school in Croton (now Crotone) in southern Italy.
Pythagoras is most famous for Pythagoras's Theorem but other important postulates are attributed to him, e.g. the sum of the angles of a triangle is equal to two right angles.