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based on an earlier version of the Wolfram Language.
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Mathematica Character Name

\[Tilde]

  • Unicode: 223C.
  • Alias: Esc ~ Esc.
  • Infix similarity operator.
  • x ∼ y is by default interpreted as Tilde[x, y].
  • Used in mathematics for many notions of similarity or equivalence.
  • Used in physical science to indicate approximate equality.
  • Occasionally used in mathematics for notions of difference.
  • Occasionally used in prefix form to indicate complement or negation.