gamma of complex argument

[smokeythebear]

Hi im trying to find the gamma function of a complex number. I see that <cmath> has the tgamma and lgamma function, but both are one argument only. Also I just now realized that <complex> has complex number support, but no support for the gamma function. Plz help me thank you :)

[ats15]

GNU scientific library http://www.gnu.org/software/gsl/manual/html_node/Gamma-Functions.html The last function implements log(gamma(complex number))