An integral transform which is often written as an ordinary Laplace Transform involving the Delta Function.
See also Laplace Transform
References
Abramowitz, M. and Stegun, C. A. (Eds.).
Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.
New York: Dover, p. 1029, 1972.
Morse, P. M. and Feshbach, H. Methods of Theoretical Physics, Part I. New York: McGraw-Hill, 1953.
Widder, D. V. The Laplace Transform. Princeton, NJ: Princeton University Press, 1941.