1 @cindex Jacobi elliptic functions
2 @cindex elliptic functions (Jacobi)
4 The Jacobian Elliptic functions are defined in Abramowitz & Stegun,
5 Chapter 16. The functions are declared in the header file
6 @file{gsl_sf_elljac.h}.
8 @deftypefun int gsl_sf_elljac_e (double @var{u}, double @var{m}, double * @var{sn}, double * @var{cn}, double * @var{dn})
9 This function computes the Jacobian elliptic functions @math{sn(u|m)},
10 @math{cn(u|m)}, @math{dn(u|m)} by descending Landen
12 @comment Exceptional Return Values: GSL_EDOM