This is documentation for Mathematica 3, which was
based on an earlier version of the Wolfram Language.
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[an error occurred while processing this directive] DoubleStruckCapitalA ... DoubleStruckCapitalZ

... \[DoubleStruckCapitalA] ... \[DoubleStruckCapitalZ]
  • Aliases: dsA through dsZ.
  • Letters.
  • Treated as distinct characters rather than style modifications of ordinary letters.
  • , , , , , are used respectively to denote the sets of natural numbers, integers, rationals, reals, complex numbers and quaternions.
  • Contiguous character codes from the private Unicode character range are used, even though a few capital double-struck characters are included in ordinary Unicode.
  • See The Mathematica Book:

    Section 3.10.3.
  • See also: \[GothicCapitalA], \[ScriptCapitalA], etc.