represents the Dirac delta function .

represents the multidimensional Dirac delta function .


  • DiracDelta[x] returns 0 for all real numeric x other than 0.
  • 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 0 if any of the xi are real numeric and not 0.
  • 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