(19) A proof that e is irrational - Numberphile - YouTube(19) A proof that e is irrational - Numberphile - YouTube External linkProfessor Ed Copeland shows a proof by Joseph "Voldemort" Fourier that e is irrational.Check out episode sponsor http://KiwiCo.com/Numberphile for 50% off yo...Tagseulers numbermathematicsContent typeLINK