TITLE: notation for finite sequence with one element is removed
QUESTION [6 upvotes]: Often you need a notation for a finite sequence with one element is removed;
i.e. $$(x_1,\dots,x_{i-1},x_{i+1}\dots, x_n).$$
I know one notation
$$(x_1,\dots,\hat x_i,\dots, x_n)$$
and I hate it. It is too long and it has no sense; i.e., unless you know the meaning you will never guess what is it.
Question: Did you see any other?

REPLY [2 votes]: Borrowing from simplicial sets/complexes, $d_i: \mathbf{n-1} \to \mathbf{n}$
is the map that skips $i$, so your sequences would be $x\circ d_i$.