Top network posts

• 33 On the polynomial $\sum_{k=0}^n\binom{n}{k}(-1)^kX^{k(n-k)}$
• 23 A finite alternating sum
• 21 The $2\pi$ in the definition of the Fourier transform
• 19 Inverse of special upper triangular matrix
• 18 Harmonic sums and elementary number theory
• 15 Prove that $x$ is an integer if $x^4-x$ and $x^3-x$ are integers.
• 13 Evaluate $\lim\limits_{n \to \infty}\frac{(-1)^n}{n!}\int_0^n (x-1)(x-2)\cdots(x-n){\rm d}x$
• View more network posts →