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 \[Square]
  • Alias: sq.
  • Prefix operator.

  • x is by default interpreted as Square[x].
  • Used in mathematical physics to denote the d'Alembertian operator.
  • Sometimes used in number theory to indicate a quadratic residue.
  • Not the same as \[EmptySquare].
  • See The Mathematica Book: Section 3.10.4.
  • See also: \[Del].