Module rgsl::psi::diagamma

Functions

psi

This routine computes the digamma function \psi(x) for general x, x \ne 0.

psi_1piy

This routine computes the real part of the digamma function on the line 1+i y, \Re[\psi(1 + i y)].

psi_1piy_e

This routine computes the real part of the digamma function on the line 1+i y, \Re[\psi(1 + i y)].

psi_e

This routine computes the digamma function \psi(x) for general x, x \ne 0.

psi_int

This routine computes the digamma function \psi(n) for positive integer n. The digamma function is also called the Psi function.

psi_int_e

This routine computes the digamma function \psi(n) for positive integer n. The digamma function is also called the Psi function.