Sum of degrees and edge count of digraphs - theorem
13:26
Graph theory: adjacent matrix
10:25
Is a sequence graphical: Havel algorithm
8:06
Hamiltonian graphs: Dirac's theorem
15:11
Bayes theorem, the geometry of changing beliefs
21:40
Same perimeter, different areas: Which is the largest? The Isoperimetric Problem
5:35
How many edges to remove from an undirected graph to make it a tree
26:12
How to Remember Everything You Read
19:14