Article,

A remarkable identity involving Bessel functions

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Proceedings of the Royal Society A: Mathematical, Physical and Engineering Science, 468 (2145): 2667-2681 (September 2012)
DOI: 10.1098/rspa.2011.0664

Abstract

We consider a new identity involving integrals and sums of Bessel functions. The identity provides new ways to evaluate integrals of products of two Bessel functions. The identity is remarkably simple and powerful since the summand and the integrand are of exactly the same form and the sum converges to the integral relatively fast for most cases. A proof and numerical examples of the identity are discussed.

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