Top network posts

• 30 Correct set notation for "all integers which are not multiples of 7"?
• 28 What do people mean with "canonical"?
• 22 How can I evaluate $\sum_{n=0}^\infty(n+1)x^n$?
• 21 Show that $\int_0^1 \left(\left\lfloor\frac{\alpha}{x}\right\rfloor-\alpha\left\lfloor\frac{1}{x}\right\rfloor\right)\mathrm dx=\alpha \ln\alpha$
• 16 Is it possible to define metric spaces from pure topological concepts without the need to define a distance function?
• 16 If I roll three dice at the same time, how many ways the sides can sum up to $13$?
• 14 How I can define this operator in Mathematica?
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