_beta _cbeta _cbeta_sub _clbeta _clbeta_sub _lbeta

_cbeta_sub() void _cbeta_sub ( double _Complex  a, double _Complex  b, double _Complex *  zout  ) Beta function B(a, b) (complex argument) Purpose cbeta_sub computes the complex beta function at a and b. B(a, b) = Γ(a)Γ(b)/Γ(a + b) cbeta_sub is the subroutine version of cbeta. Parameters [in] a Argument a. (re(a) > 0) [in] b Argument b. (re(b) > 0) [out] zout Complex beta function B(a, b). Error handling If re(a) <= 0 or re(b) <= 0, domain error (EDOM) occurs. Range error (ERANGE) may occur.