Barton Willis wrote:
> The (misspelled) functions spherodialwave_a and spherodialwave_b are
> supposed to be solutions to A&S 20.1.8. The DEs 20.1.8 and 21.6.4 are
> related through a point transformation, I think.
>
> What is the best source for the spheroidal wave functions?
>
I don't know much about these functions, but
http://mathworld.wolfram.com/SpheroidalWaveFunction.html gives around a
dozen references. The review paper by Falloon et al
(http://arxiv.org/abs/math-ph/0212051/) is a recent review.