7.31.2 Riemann Zeta Function Minus One
For large positive argument, the Riemann zeta function approaches one.
In this region the fractional part is interesting, and therefore we
need a function to evaluate it explicitly.
— Function: double
gsl_sf_zetam1_int (
int n)
— Function: int
gsl_sf_zetam1_int_e (
int n, gsl_sf_result * result)
These routines compute \zeta(n) - 1 for integer n,
n \ne 1.
— Function: double
gsl_sf_zetam1 (
double s)
— Function: int
gsl_sf_zetam1_e (
double s, gsl_sf_result * result)
These routines compute \zeta(s) - 1 for arbitrary s,
s \ne 1.