Standard Library

beta

DOCUMENT beta(z,w)
  returns the beta function gamma(z)gamma(w)/gamma(z+w)

SEE ALSO: ln_gamma, bico

bico

DOCUMENT bico(n,k)
  returns the binomial coefficient n!/(k!(n-k)!) as a double.

SEE ALSO: ln_gamma, beta

erfc_nr

DOCUMENT erfc_nr(x)
  returns the complementary error function 1-erf with fractional
  error less than 1.2e-7 everywhere.

lngamma

DOCUMENT lngamma(x)
  returns natural log of the gamma function.
  Error is less than 1e-13 for real part of x>=1.
  Use ln_gamma if some x<1.

SEE ALSO: ln_gamma, bico, beta

ln_gamma

DOCUMENT ln_gamma(z)
  returns natural log of the gamma function.
  Error is less than 1e-13 for real part of z>=1.
  Use lngamma if you know that all z>=1, or if you don't care much about
  accuracy for z<1.

SEE ALSO: lngamma, bico, beta