Functions
double _Complex	_cdigamma (double _Complex z)
	Digamma (or psi) function ψ(z) (complex argument)

void	_cdigamma_sub (double _Complex z, double _Complex *zout)
	Digamma (or psi) function ψ(z) (complex argument)

double	_digamma (double x)
	Digamma (or psi) function ψ(x)

double	_polygamma (int n, double x)
	Polygamma function ψn(x)

double	_trigamma (double x)
	Trigamma function ψ1(x)

Detailed Description

This is the group of C7c. Polygamma functions.

Functions