c.365 - c.280 BC
Greek Mathematician

Euclid wrote the classical book
'The Elements', a collection of geometrical theorems which became a standard work for over 2000 years, which made Euclid the leading mathematics teacher of all time.

Euclid lived in Alexandria where he founded the first school of mathe-matics. 'The Elements' consist of
13 books containing chapters on geometrical algebra and number theory.

Euclid proved the number of primes, numbers which are divisible only by themselves and one, to be infinite. He also wrote books on conic sections and optics.

Note: Dates for Euclid's life vary greatly, sometimes his lifetime is assumed to be from 430 - 360 BC.

www link :
From the Internet Encyclopedia of Philosophy

From the University of St. Andrews, Scotland. School of Mathematics