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();