cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ] #include <mathcw.h> extern float eljtd1f (float u, float q); extern double eljtd1 (double u, double q); extern long double eljtd1l (long double u, long double q); extern __float80 eljtd1w (__float80 u, __float80 q); extern __float128 eljtd1q (__float128 u, __float128 q); extern long_long_double eljtd1ll (long_long_double u, long_long_double q); extern decimal_float eljtd1df (decimal_float u, decimal_float q); extern decimal_double eljtd1d (decimal_double u, decimal_double q); extern decimal_long_double eljtd1dl (decimal_long_double u, decimal_long_double q); extern decimal_long_long_double eljtd1dll (decimal_long_long_double u, decimal_long_long_double q);
NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.
theta1'(u,q) / theta1(u,q) = eljtd1(u,q).
The argument u is unrestricted, but q is required to be in [0,1).
See M. Abramowitz & I. A. Stegun, Handbook of Mathematical Functions, Chapter 16, for definitions of the Jacobian elliptic, theta, and zeta functions.