float *vector();
float **matrix();
float **convert_matrix();
double *dvector();
double **dmatrix();
int *ivector();
int **imatrix();
float **submatrix();
void free_vector();
void free_dvector();
void free_ivector();
void free_matrix();
void free_dmatrix();
void free_imatrix();
void free_submatrix();
void free_convert_matrix();
void nrerror();
