Let $n$ be a nonnegative integer. The set $\lbrace 1,2,\ldots, n\rbrace$ is partitioned into blocks, with $p\left(n\right)$ possibilities (e.g., for permutations $p\left(n\right)=n!).$ For each block of size $i$, one of $m_i$ possible structures is chosen (for permutations, $m_i = \left(i-1\right...

Let the convolution of two function $f$ and $g$ be defined over $\mathbb{R}^3\times [0,\infty)$ as followed \begin{equation}\label{ConvoDef} \left(f*g\right)\circ(\textbf{x},t) = \int_{0}^{t}{\int_{\mathbb{R}^3}^{}{f(\textbf{x}-\textbf{y},t-s)g(\textbf{y},s)d\textbf{y}ds}} \end{equation} Let $$f(...

Do we have recommended tags for obvious spam or offensive questions, like this one? For now I retagged it to [spam] just to get it out of the [java] view, but then I saw, that the [spam] tag is used for serious questions concerning spam too. Removing all tags is not possible so even spam messag...

There's a related question about editing the text of spam: Should spam posts be edited?. I've always understood this to include any sort of edits on a spam post, including tag edits. The tag exert for the Stack Overflow [spam] tag includes an explicit warning DO NOT USE THIS TAG ON QUESTIONS THA...