Beta Cbeta Clnbeta Lnbeta

Cbeta() Function Cbeta ( ZA As  Complex, ZB As  Complex, Optional Info As  Long  ) Beta function B(a, b) (complex argument) Purpose This routine computes the complex beta function at a and b. B(a, b) = Γ(a)Γ(b)/Γ(a + b) Returns Complex Complex beta function B(a, b). Parameters [in] ZA Argument a. (re(ZA) > 0) [in] ZB Argument b. (re(ZB) > 0) [out] Info (Optional) = 0: Successful exit. = -1: The argument ZA had an illegal value. (re(ZA) <= 0) = -2: The argument ZB had an illegal value. (re(ZB) <= 0) = 1: Floating point range error.