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Dirac delta

noun

Etymology

Named after English theoretical physicist Paul Dirac (1902–1984); the notation was chosen because the symbol behaves analogously to the Kronecker delta.

Definitions

  1. A function-like symbol denoted as δ, with the property ∫f(t)δ(x-t)dt=f(x), informally…

    A function-like symbol denoted as δ, with the property ∫f(t)δ(x-t)dt=f(x), informally understood as a function with an infinite value at 0 and zero elsewhere, and formally as a distribution or a measure.

The neighborhood

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sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA