Dirac delta function
The Dirac delta function, often written as , is a made-up concept by mathematician Paul Dirac. It is a really pointy and skinny function that pokes out a point along a wave. Loosely speaking, it has the value of zero everywhere except at , in such a way that the area between the function and the x-axis adds up to 1. The delta function is often used in sampling theory, where its pointiness is useful for getting clean samples.
- "List of Calculus and Analysis Symbols". Math Vault. 2020-05-11. Retrieved 2020-10-06.
- Weisstein, Eric W. "Delta Function". mathworld.wolfram.com. Retrieved 2020-10-06.