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

\[Del]

  • Unicode: 2207.
  • Alias: Esc del Esc.
  • Prefix operator.
  • del f is by default interpreted as Del[f].
  • Used in vector analysis to denote gradient operator and its generalizations.
  • Used in numerical analysis to denote backward difference operator.
  • Also called nabla.