cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ] #include <mathcw.h> extern float eljqf (float u, float k); extern double eljq (double u, double k); extern long double eljql (long double u, long double k); extern __float80 eljqw (__float80 u, __float80 k); extern __float128 eljqq (__float128 u, __float128 k); extern long_long_double eljqll (long_long_double u, long_long_double k); extern decimal_float eljqdf (decimal_float u, decimal_float k); extern decimal_double eljqd (decimal_double u, decimal_double k); extern decimal_long_double eljqdl (decimal_long_double u, decimal_long_double k); extern decimal_long_long_double eljqdll (decimal_long_long_double u, decimal_long_long_double k);
NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.
The companion function eljk(q) provides the inverse operation, such that
k = eljk(q), q = eljq(k).
See M. Abramowitz & I. A. Stegun, Handbook of Mathematical Functions, Chapter 16, for definitions of the Jacobian elliptic, theta, and zeta functions.