Badge
| Good Question | Question score of 25 or more. This badge can be awarded multiple times. |
Mike Spivey earned this badge 5 times |
may 19 at 5:56
Nice proofs of $\zeta(4) = \pi^4/90$?
dec 9 '11 at 20:51
Combinatorial proof that $\sum \limits_{k=0}^n \binom{2k}{k} \binom{2n-2k}{n-k} (-1)^k = 2^n \binom{n}{n/2}$ when $n$ is even
oct 6 '11 at 23:03
Partitioning the integers $1$ through $n$ so that the product of the elements in one set is equal to the sum of the elements in the other
sep 5 '11 at 5:24
Ways to evaluate $\int \sec \theta \, d \theta$
feb 27 '11 at 7:07
Designing an Irrational Numbers Wall Clock
