Lebedev transform

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The integral transform

where and are the modified cylinder functions. It was introduced by N.N. Lebedev [1]. If

then for almost-all one has the inversion formula


[1] N.N. Lebedev, "On an integral representation of an arbitrary function in terms of squares of MacDonald functions with imaginary index" Sibirsk. Mat. Zh. , 3 : 2 (1962) pp. 213–222 (In Russian)


The following transform pair is also called a Lebedev transform (or Kontorovich–Lebedev transform)


[a1] N.N. Lebedev, "Special functions and their applications" , Prentice-Hall (1965) (Translated from Russian)
[a2] I.N. Sneddon, "The use of integral transforms" , McGraw-Hill (1972) pp. Chapt. 6
How to Cite This Entry:
Lebedev transform. Encyclopedia of Mathematics. URL:
This article was adapted from an original article by Yu.A. BrychkovA.P. Prudnikov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article