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Topic: Gamma Function - Bessel Function Identity
Replies: 3   Last Post: Sep 24, 2012 5:30 AM

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 ksoileau Posts: 83 From: Houston, TX Registered: 3/9/08
Gamma Function - Bessel Function Identity
Posted: Sep 6, 2012 10:43 AM

I have observed and proved the following identity for all x\ne 0 :
$$(I_{k-1}(x) +I_{k+1}(x) )I_{-k}(x) -(I_{-k-1}(x)+I_{-k+1}(x))I_k(x) = \frac{4 k}{x \Gamma (1-k) \Gamma (1+k)}$$

Is this well-known or trivially derived? Any comments will be appreciated.
Thanks,
Kerry M. Soileau

Date Subject Author
9/6/12 ksoileau
9/7/12 G. A. Edgar
9/7/12 Herman Rubin
9/24/12 Tom D