beta cbeta cbeta_sub clbeta clbeta_sub lbeta

cbeta() doublecomplex cbeta ( doublecomplex  a, doublecomplex  b  ) Beta function B(a, b) (complex argument) Purpose cbeta computes the complex beta function at a and b. B(a, b) = Γ(a)Γ(b)/Γ(a + b) Returns Complex beta function B(a, b). Parameters [in] a Argument a. (re(a) > 0) [in] b Argument b. (re(b) > 0) Error handling If re(a) <= 0 or re(b) <= 0, domain error (EDOM) occurs. Range error (ERANGE) may occur.