Vector notation of all entries 1

Question

Is there any notation describing a vector with all components being 1? Or whether the bold-face one $\mathrm 1$ is publicly acknowledged as it?

Answer 1

I have seen $\mathbf {j} $ used for the all 1's vector with $\mathbf {J} $ used for the all 1's matrix.

Answer 2

I know that in computer science the zero-vector is writen $\vec{0}$, and sometime they extend it to the"ones"-vector $\vec{1}$.

Good luck !

Answer 3

I have also seen the usage of a "\mathbb{1}" for it, I think it is more clear than others, however mathbb doesn't support digits, there are some options using other packages which you may find here.