12
$\begingroup$

I noticed that some of the more frequently used MO tags are formatted according to a certain pattern, e.g.:

  • nt.number-theory
  • pr.probability
  • lo.logic
  • fa.functional-analysis

Why are the tags formatted like this? Are they shortcuts for user convenience?

$\endgroup$
3

1 Answer 1

22
$\begingroup$

The tags with a two-letter prefix are exactly those tags that correspond to a math subject class on arXiv. They serve as top-level tags. As a rule, each question should have at least one of these top-level tags.

The formatting is mainly in place to distinguish them from usual tags; that it can be convenient is a side aspect, in particular, other tags of this form must not be created 'for convenience', they will be deleted as soon as they are noted.


A complete list of these tags (copied from François G. Dorais)

$\endgroup$

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .