! CHGUIT computes the hypergeometric function using Gauss-Legendre integration.
Discussion:
This procedure computes the hypergeometric function U(a,b,x) by
using Gaussian-Legendre integration (n = 60)
Licensing:
This routine is copyrighted by Shanjie Zhang and Jianming Jin. However,
they give permission to incorporate this routine into a user program
provided that the copyright is acknowledged.
Modified:
22July2012
Author:
Shanjie Zhang, Jianming Jin
Reference:
Shanjie Zhang, Jianming Jin,
Computation of Special Functions,
Wiley, 1996,
ISBN: 0-471-11963-6,
LC: QA351.C45.
Parameters:
Input, double precision A, B, parameters.
Input, double precision X, the argument.
Output, double precision HU, U(a,b,z).
Output, integer ID, the estimated number of significant digits.
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Nodes of different colours represent the following:
Solid arrows point from a procedure to one which it calls. Dashed
arrows point from an interface to procedures which implement that interface.
This could include the module procedures in a generic interface or the
implementation in a submodule of an interface in a parent module.