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Results tagged with bessel-functions
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user 108692
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Indefinite summation of multiplication of two Bessel functions
Could anyone give an insight on how to prove the following formula?
$$\sum_{n=-\infty}^{+\infty}J_{n}(\alpha)J_{N+n}(\alpha)=\delta_{N0} \, ,$$
where $N$ is an integer. I checked many references bu …
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