Eta Function
The eta function is defined by
\eta(s) = (1-2^{1-s}) \zeta(s).
- Function: double gsl_sf_eta_int (int n)
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- Function: int gsl_sf_eta_int_e (int n, gsl_sf_result * result)
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These routines compute the eta function \eta(n) for integer n.
- Function: double gsl_sf_eta (double s)
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- Function: int gsl_sf_eta_e (double s, gsl_sf_result * result)
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These routines compute the eta function \eta(s) for arbitrary s.