The Kronecker Comb
The Kronecker comb function with period N is defined (using digital notation) as:
where N and n are integers. The Kronecker comb thus consists of an infinite series of unit impulses N units apart, and includes the unit impulse at zero. It may be considered to be the discrete analog of the Dirac comb.
Read more about this topic: Kronecker Delta
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—Gwendolyn Brooks (b. 1917)