Bracewell's term for the delta function.
Impulse Symbol
See also
Delta Function, Impulse Pair, Shah FunctionExplore with Wolfram|Alpha
References
Bracewell, R. The Fourier Transform and Its Applications, 3rd ed. New York: McGraw-Hill, 1999.Referenced on Wolfram|Alpha
Impulse SymbolCite this as:
Weisstein, Eric W. "Impulse Symbol." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ImpulseSymbol.html