Celli1 Celli1_sub Celli2 Celli2_sub Celli3 Celli3_sub Elli1 Elli1_sub Elli2 Elli2_sub Elli3 Elli3_sub Hlambda Hlambda_sub Jzeta Jzeta_sub Rc Rc_sub Rd Rd_sub Rf Rf_sub Rg Rg_sub Rj Rj_sub

Celli1_sub() Sub Celli1_sub ( Ret As  Double, K As  Double, Optional Info As  Long  ) Complete elliptic integral of the first kind K(k) (Subroutine version) Purpose Computes the Legendre form of complete elliptic integral of the first kind K(k). K(k) = F(π/2, k) where F(φ, k) is the incomplete elliptic integral of the first kind defined as follows. F(φ, k) = ∫ 1/sqrt(1 - k^2(sin(t))^2) dt [0, φ] Parameters [out] Ret Complete elliptic integral of the first kind K(k). [in] K Argument k. (-1 < K < 1) [out] Info (Optional) = 0: Successful exit. = -1: The argument K had an illegal value. (K <= -1 or K >= 1) = 1: Floating point range error. Reference boost/math/special_functions