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FilledSmallSquare DiscreteDelta[, , ... ] gives the discrete delta function , equal to 1 if all the are zero, and 0 otherwise.

FilledSmallSquare DiscreteDelta[0] gives 1; DiscreteDelta[n] gives 0 for other numeric n.

FilledSmallSquare DiscreteDelta has attribute Orderless.

FilledSmallSquare See Section 3.5.12.

FilledSmallSquare See also: IdentityMatrix, UnitStep, If, Signature, DiracDelta.

FilledSmallSquare New in Version 4.

Further Examples