At Wed, 07 Jul 2010 10:14:34 -0500,
Raymond Rogers wrote:
>
> 1) I was unable to find the valid domain of the argument a when x<0.
> Experimenting yields what seem to be erratic results. Apparently
> correct answers occur when {x<0&a<0& a integer}. References would be
> sufficient. Unfortunately {x<0,a<0} is exactly the wrong range for my
> problem; but the recursion relations can be used to stretch to a>0. If
> I can find a range of correct operation for the domain of "a" of width >1.
Thanks for the email. There are some comments about the domain for
the hyperg_U_negx function in specfunc/hyperg_U.c -- do they help?
--
Brian Gough
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