17:57

e is irrational (e∉ℚ)

11:03

How do we know π is infinite and never repeats? Proving pi is irrational #PiDay

21:20

e is irrational -- the best proof!!

28:47

So many factorials!!!

15:47

Pi is Evil - Numberphile

21:21

A nice integral.

23:20

Pi is IRRATIONAL: animation of a gorgeous proof

9:26

Breaking the rules of math π = 0. Where is the mistake?