TITLE: Notation convention for $\{1,\ldots,n\}$
QUESTION [5 upvotes]: Is there any convention for a notational shorthand for the set $\{1,\ldots,n\}$ (defined as $\{k\in\mathbb{N} \mid k \le n\}$), where $n\in\mathbb{N}$, that the majority of mathematicians are familiar with?
I find that in some cases in which these sets appear often in the same expression, which can reduce readability, or at least aesthetic cleanness; using some sort of abbreviation would alleviate that.

REPLY [4 votes]: In homotopy theory, both $[n]$ and $\mathbf{n}$ are common and, to a lesser extent, $\underline{n}$.  None of this matters too much, as long as you define your choice of notation clearly in your writing.