21 double gammp(
double a,
double x);
23 double gammq(
double a,
double x);
25 void gser(
double *gamser,
double a,
double x,
double *gln);
27 void gcf(
double *gammcf,
double a,
double x,
double *gln);
void gser(double *gamser, double a, double x, double *gln)
double gammln(double xx)
Returns the value ln[?(xx)] for xx > 0.
void gcf(double *gammcf, double a, double x, double *gln)
Returns the incomplete gamma function Q(a, x) evaluated by its continued fraction representation as g...
double gammp(double a, double x)
Returns the incomplete gamma function P(a, x).
double erf(double x)
Returns the error function erf(x).
double gammq(double a, double x)
Returns the incomplete gamma function Q(a, x) ? 1 ? P(a, x).