1988年，Springer-Verlag主持在Mathematical Intelligencer上评选10个最美数学定理，结果如下：
1. Euler’s identity, $e^{i\pi}=-1$.
2. Euler’s formula for a polyhedron, $V+F=E+2$.
3. There are infinitely many prime numbers.
4. There are only 5 regular polyhedra.
5. The sum of the reciprocals of the squares of the positive integers is $\pi^2/6$.
6. A continuous mapping of a closed unit disk into itself has a fixed point.
7. The square root of 2 is irrational.
8. $\pi$ is a transcendental number.
9. Every plane map can be colored with just 4 colors.
10. Every prime number of the form $4n+1$ is the sum of two square integers in only one way.
转载自: http://www.math.org.cn/forum.php?mod=viewthread&tid=36509
原文：http://www.cnblogs.com/zhangzujin/p/5793154.html