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Anton Petrunin
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Once I had the same problem, I used notation similar to yours: $\mathbf{0}$ for zero-vector and $\mathbf{1}$ for "all-ones vector".

  • It is NOT common, so you have to define it

  • I would not do it unless you have many formulas with it --- if you use it just few times denote it by some letter...

Anton Petrunin
  • 45k
  • 14
  • 135
  • 299