PURUSPE

PURe RUSt SPEcial function library. There are no dependencies.

Implemented Functions

Gamma functions

• ln_gamma : Logarithmic gamma function
• gamma : Gamma function
• gammap : Regularized lower gamma function
• gammaq : Regularized upper gamma function
• invgammp : Inverse regularized lower gamma function

Beta function

• beta : Beta function
• betai : Regularized Incomplete beta function
• invbetai : Inverse regularized incomplete beta function

Error functions

• erf : Error function
• erfc : Complementary Error function
• inverf : Inverse error function
• inverfc : Inverse complementary error function

Reference

• Press, William H., and William T. Vetterling. Numerical Recipes. Cambridge: Cambridge Univ. Press, 2007.