Sums of squares -- Number Theory 26
39:08
Quadratic Forms -- Number Theory 27
18:11
Is this the most beautiful proof? (Fermat's Two Squares)
8:08
Mathematical Induction Proof for the Sum of Squares
27:26
Ramanujan's famous (mod 5) congruence -- Number Theory 33
29:02
Wilson's Theorem -- Number Theory 14
8:57
Making Sense of Ramanujan's Infinite Sum for General Audience.
21:53
1 Billion is Tiny in an Alternate Universe: Introduction to p-adic Numbers
1:02:35