5:59

Functional equation of reciprocal

18:35

The Basel Problem

21:26

a very interesting differential equation

15:24

Romanian Mathematics Olympiad

11:23

A functional equation from my favorite book.

38:38

100 Kişi, 100 Çember, 500.000 Dolar

17:08

Solving a Quartic Equation

14:15

Functional Equation