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KroneckerDelta

KroneckerDelta[n₁, n₂, ...]
gives the Kronecker delta

, equal to 1 if all the

are equal, and 0 otherwise.

MORE INFORMATION

KroneckerDelta[0] gives 1; KroneckerDelta[n] gives 0 for other numeric n.

KroneckerDelta has attribute Orderless.

Basic Examples (3)

Construct identity matrix:

Out[1]//MatrixForm=

Use in sums to pick out elements:

Applications (3)

Properties & Relations (2)

Possible Issues (2)

Neat Examples (1)

DiscreteDelta IdentityMatrix UnitVector Equal UnitStep If Boole Signature DiracDelta

Integer and Number Theoretic Functions

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