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There is a particular note in my textbook which says:

When you represent vectors by single letters in handwritten work, you should write them as $\underset{\sim}{A}$

I haven't seen this form of notation being used elsewhere; thoughts on whether or not I should use it (for an exam)?

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    $\begingroup$ You can use all notations you want as far as you clearly define them. $\endgroup$
    – Surb
    Commented Jul 14, 2021 at 12:57
  • $\begingroup$ For exams: Copy what your professor does (provided you have any examples there; you can also ask them). Otherwise, do what you prefer, though a squiggly underline is completely new to me as well. (Underlining, little arrows on top or no special marking are all much more common, I think.) $\endgroup$
    – Eike Schulte
    Commented Jul 14, 2021 at 14:14
  • $\begingroup$ (If grading is done reasonably, whether you underline your vectors should be irrelevant.) $\endgroup$
    – Eike Schulte
    Commented Jul 14, 2021 at 14:16
  • $\begingroup$ This is the traditional way of marking up "boldface" for a printer. $\endgroup$
    – ancient mathematician
    Commented Jul 14, 2021 at 15:14

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