public static int _set_mintype_fn(System.IntPtr state, ref gsl_multimin_function_struct f, ref gsl_vector x, ref double size, ref gsl_vector step_size) { return 0; }
public static int _iterate_mintype_fn(System.IntPtr state, ref gsl_multimin_function_struct f, ref gsl_vector x, ref double size, ref double fval) { return 0; }