beta cbeta cbeta_sub clbeta clbeta_sub lbeta

clbeta() doublecomplex clbeta ( doublecomplex  a, doublecomplex  b  ) Logarithm of beta function ln(B(a, b)) (complex argument) Purpose clbeta computes the logarithm of the complex beta function ln(B(a, b)). B(a, b) = Γ(a)Γ(b)/Γ(a + b) Note This is a preliminary version that is not accurate enough. Returns Logarithm of the complex beta function ln(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.