Integral representation of modified Bessel function of the second kind

AI Thread Summary
An integral representation for the modified Bessel function of the second kind, K_{1/2}, is provided as z^{-\frac{1}{4}}K_{1/2}(\sqrt{z}) proportional to the integral of exp^{-zt-1/t}t^{-1/2} from 0 to infinity. The discussion seeks to generalize this representation for arbitrary values of ν. Participants suggest that a generating function might be useful for this generalization. The conversation emphasizes the need for a hint or guidance rather than a complete solution. The thread concludes with a reference to a general form that has been attached for further examination.
ulriksvensson
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Hi all. I need an integral representation of z^{-\nu}K_{\nu} of a particular form. For K_{1/2} it looks like this:

z^{-\frac{1}{4}}K_{1/2}(\sqrt{z}) \propto \int_{0}^{\infty}dt\exp^{-zt-1/t}t^{-1/2}

How do I generalize this for arbitrary \nu? A hint is enough, maybe there's a generating function one can use?

//Ulrik
 
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Hi
The general form is attached.
 

Attachments

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