DiracComb

DiracComb[x] represents the Dirac comb function giving a delta function at every integer point.

DiracComb[x1, x2, ...] represents the multidimensional Dirac comb function.

Examples

Fourier transform of Dirac comb:

FourierTransform[DiracComb[x], x, k]

Sampling with DiracComb:

DiracComb[x] Sin[2 Pi x]

Please visit the official Wolfram Language Reference for more details.