double glomin ( double a, double b, double c, double m, double e, double t, 
  double f ( double x ), double &x );
double local_min ( double a, double b, double t, double f ( double x ), 
  double &x );
double local_min_rc ( double &a, double &b, int &status, double value );
double r8_abs ( double x );
double r8_epsilon ( );
double r8_max ( double x, double y );
double r8_sign ( double x );
void timestamp ( );
double zero ( double a, double b, double t, double f ( double x ) );
void zero_rc ( double a, double b, double t, double &arg, int &status, 
  double value );