Jcd Jcd_sub Jcn Jcn_sub Jcs Jcs_sub Jdc Jdc_sub Jdn Jdn_sub Jds Jds_sub Jelli Jnc Jnc_sub Jnd Jnd_sub Jns Jns_sub Jsc Jsc_sub Jsd Jsd_sub Jsn Jsn_sub Jtheta1 Jtheta1_sub Jtheta1t Jtheta1t_sub Jtheta2 Jtheta2_sub Jtheta2t Jtheta2t_sub Jtheta3 Jtheta3_sub Jtheta3m1 Jtheta3m1_sub Jtheta3m1t Jtheta3m1t_sub Jtheta3t Jtheta3t_sub Jtheta4 Jtheta4_sub Jtheta4m1 Jtheta4m1_sub Jtheta4m1t Jtheta4m1t_sub Jtheta4t Jtheta4t_sub

Jcn_sub() Sub Jcn_sub ( Ret As  Double, U As  Double, K As  Double, Optional Info As  Long  ) Jacobi elliptic function cn(u, k) (Subroutine version) Purpose Computes the Jacobi elliptic function cn(u, k). The function is defined as follows, given: u = ∫ 1/√(1 - k^2(sin(t))^2) dt [0, φ] The angle φ is called the amplitude and: cn(u, k) = cosφ Parameters [out] Ret Jacobi elliptic function cn(u, k). [in] U Argument u. [in] K Argument k. [out] Info (Optional) = 0: Successful exit. = 1: Floating point range error. Reference boost/math/special_functions