A Dozen Proofs: Sum of Integers Formula (visual proofs) #SoME2
2:30
Intersecting Chords Theorem (visual proof)
31:13
What is Group Theory? — Group Theory Ep. 1
1:46
a mystery Xmas puzzle
6:46
Beautiful Geometry behind Geometric Series (8 dissection visual proofs without words) #math #series
6:19
Seven Proofs Without Words for Summing Cubes
15:32
What is the graph of x^a when a is not an integer? An unusual look at familiar functions #some2
15:01
The Shadowy World of Umbral Calculus
6:51