_jcd _jcn _jcs _jdc _jdn _jds _jelli _jnc _jnd _jns _jsc _jsd _jsn

_jelli() void _jelli ( double  u, double  k, double *  sn, double *  cn, double *  dn  ) Jacobi elliptic functions sn(u, k), cn(u,k), dn(u, k) Purpose jelli computes the Jacobi elliptic functions sn(u, k), cn(u,k) and dn(u, k). The functions are defined as follows, given: u = ∫ 1/√(1 - k^2(sin(t))^2) dt [0, φ] The angle φ is called the amplitude and: sn(u, k) = sinφ cn(u, k) = cosφ dn(u, k) = √(1 - k^2(sin(φ))^2) Parameters [in] u Argument u. [in] k Argument k. [out] sn sn(u, k) value. [out] cn cn(u, k) value. [out] dn dn(u, k) value. Error handling Range error (ERANGE) may occur. Reference boost/math/special_functions