Complex Digamma function in gsl

[Brian Gough]

Gerard Jungman writes:
 > Hi. It's best to post directly to gsl-discuss@sources.redhat.com.
 > Somebody might be able to help you. I am cc'ing the list on this.
 > 
 > Currently there are only real-argument versions of the
 > various poly-gamma functions, although there is a
 > complex version of the gamma function.

Jerry, what's your opinion on the CPSI routine in SLATEC?  It looks
fairly simple.

-- 
Brian Gough

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