WJcd WJcn WJcs WJdc WJdn WJds WJnc WJnd WJsc WJsd WJsn WJtheta1 WJtheta1t WJtheta2 WJtheta2t WJtheta3 WJtheta3m1 WJtheta3m1t WJtheta3t WJtheta4 WJtheta4m1 WJtheta4m1t WJtheta4t

WJds() Function WJds ( U As  Double, K As  Double  ) Jacobi elliptic function ds(u, k) Purpose This function computes the Jacobi elliptic function ds(u, k). The function is defined as follows: ds(u, k) = dn(u, k) / sn(u, k) Returns ds(u, k). Parameters [in] U Argument u. [in] K Argument k. Reference boost/math/special_functions