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 Good Answer Answer score of 25 or more. This badge can be awarded multiple times.

robjohn earned this badge 5 times
dec 24 at 16:15
Computing $\zeta(6)=\sum\limits_{k=1}^\infty \frac1{k^6}$ with Fourier series.
dec 4 at 16:39
Find a $4\times 4$ matrix $A$ where $A\neq I$ and $A^2 \neq I$, but $A^3 = I$.
sep 6 at 23:20
Question about a rotating cube?
aug 24 at 9:02
How to prove a trigonometric identity
mar 7 '12 at 6:17
How to prove that $\lim\limits_{x\to0}\frac{\sin x}x=1$?

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