Why is 4-color theorem easier on a torus?
14:13
You are probably wrong about Euler's formula (it's an inequality!)
14:18
The Four Color Map Theorem - Numberphile
17:42
How physics solves a math problem (and a 3D graphics problem)
22:09
The most important theorem in differential geometry: Gauss-Bonnet theorem
23:06
Math News: The Fish Bone Conjecture has been deboned!!
45:24
Why you can't solve quintic equations (Galois theory approach) #SoME2
9:04
Math's Map Coloring Problem - The First Proof Solved By A Computer
29:57