11:56

an exceedingly interesting differential equation

13:44

on the growth of a nice recursive sequence

8:33

A Functional Equation from British Math Olympiads 2009

13:38

what a great "double" functional equation!

15:21

everyone loves a nice recursive sequence!

15:24

Romanian Mathematics Olympiad

16:24

a functional equation

17:26

Researchers thought this was a bug (Borwein integrals)