Top network posts

• 33 On the polynomial $\sum_{k=0}^n\binom{n}{k}(-1)^kX^{k(n-k)}$
• 18 The $2\pi$ in the definition of the Fourier transform
• 18 Inverse of special upper triangular matrix
• 9 If $x_{n+1}= \frac{nx_{n}^2+1}{n+1}$ then $x_{n}=1$
• 9 Is it true that $\sum_{k=m}^n\frac{\sigma(k)}k\not\in\mathbb Z$ for all derangements $\sigma\in S_n$ and $1\le m\le n$?
• 8 Partition of [3n] into summoids
• 8 Average size of extreme points of convex hull of $N$ points
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