void bivariate_normal_cdf_values ( int *n_data, double *x, double *y, 
  double *r, double *fxy );
double bivnor ( double h, double k, double r );
void bivnor_test ( );
double gauss ( double t );
void normal_01_cdf_values ( int *n_data, double *x, double *fx );
void owen_values ( int *n_data, double *h, double *a, double *t );
double q ( double h, double ah );
double r8_max ( double x, double y );
double r8_min ( double x, double y );
double t ( double h, double a );
void t_test ( );
double tfun ( double h, double a, double ah );
void timestamp ( void );
double znorm1 ( double z );
void znorm1_test ( );
double znorm2 ( double z );
void znorm2_test ( );