Leonhard Euler
Leonhard Euler (15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician and engineer. He made important and influential discoveries in many branches of mathematics, such as infinitesimal calculus and graph theory. Euler is credited for introducing the greek letter pi to denominate the Archimedes constant. His collected works fill 92 volumes, more than anyone else...