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