Adrien-Marie Legendre

lived from 1752 to 1833

Adrien-Marie Legendre's major work on elliptic integrals provided basic analytical tools for mathematical physics. He gave a simple proof that π is irrational as well as the first proof that π2 is irrational.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Legendre.html