Wolfram Language & System 10.4 (2016)|Legacy Documentation

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represents the Dirac delta function .

represents the multidimensional Dirac delta function .


  • DiracDelta[x] returns for all numeric x other than .
  • DiracDelta can be used in integrals, integral transforms, and differential equations.
  • Some transformations are done automatically when DiracDelta appears in a product of terms.
  • DiracDelta[x1,x2,] returns if any of the are numeric and not .
  • DiracDelta has attribute Orderless.
  • For exact numeric quantities, DiracDelta internally uses numerical approximations to establish its result. This process can be affected by the setting of the global variable $MaxExtraPrecision.
Introduced in 1999