A Functional Equation from Taiwan's International Mathematics Olympiad Training.
5:47
0! = 1! = 1
14:11
A Diophantine Equation @dhdkro
10:43
Solving a septic equation
13:38
what a great "double" functional equation!
7:27
Solving An Insanely Hard Problem For High School Students
30:15
The Math of "The Trillion Dollar Equation"
17:10
Third International Mathematics Olympiad #2
14:15