[Edit: I overlooked the fact that, being free under GPL, the GSL implementations do not suit the author's intent. (See /jwmerrill's comment below). Leaving the

[Edit: I overlooked the fact that, being free under GPL, the GSL implementations do not suit the author's intent. (See /jwmerrill's comment below). Leaving the comment anyway just for reference, but my original point is moot.] This. The author should have at least mentioned the ubiquituous and reasonably well-maintained GNU Scientific Library (GSL) [1], which already implements all the functions listed in the article [2,3,4,5], among many, many other things [6]. [1] http://www.gnu.org/software/gsl/ http://www.gnu.org/software/gsl/ [2] http://www.gnu.org/software/gsl/manual/html_node/Incomplete-Gamma-Functions.html#Incomplete-Gamma-Functions http://www.gnu.org/software/gsl/manual/html_node/Incomplete-... [3] http://www.gnu.org/software/gsl/manual/html_node/Incomplete-Beta-Function.html#Incomplete-Beta-Function http://www.gnu.org/software/gsl/manual/html_node/Incomplete-... [4] http://www.gnu.org/software/gsl/manual/html_node/The-Gaussian-Distribution.html#The-Gaussian-Distribution http://www.gnu.org/software/gsl/manual/html_node/The-Gaussia... [5] http://www.gnu.org/software/gsl/manual/html_node/Bessel-Functions.html#Bessel-Functions http://www.gnu.org/software/gsl/manual/html_node/Bessel-Func... [6] http://www.gnu.org/software/gsl/manual/html_node/ http://www.gnu.org/software/gsl/manual/html_node/