Loadable Function: z = gsl_sf_gammastar (arg1)

Loadable Function: [z, err] = gsl_sf_gammastar (…)

Computes the regulated Gamma Function \Gamma^*(x) for x > 0. The regulated gamma function is given by,

\Gamma^*(x) = \Gamma(x)/(\sqrt{2\pi} x^{(x-1/2)} \exp(-x)) = (1 + (1/12x) + ...) for x \to \infty

and is a useful suggestion of Temme.

err contains an estimate of the absolute error in the value z.

This function is from the GNU Scientific Library, see http://www.gnu.org/software/gsl/ for documentation.

Package: gsl