Top network posts

• 136 Different methods to compute $\sum\limits_{k=1}^\infty \frac{1}{k^2}$ (Basel problem)
• 30 Interesting and unexpected applications of $\pi$
• 8 A linear transformations cannot be onto if its domain has smaller dimension
• 6 How to prove this series converges $\sum_{n=2}^\infty \frac{\ln(n)}{n^{3/2}}$?
• 6 I can't quite figure out this "separable equation"
• 6 Why is $f(n) =\frac{n(n+1)(n+2)}{(n+3)}$ in $O(n^2)$?
• 5 Prove that if $f(x+y)=f(x)f(y)$ and f is continuous in $ x=0$, then it is continuous in all its domain
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