void    lina_dot(double *A, double *B, double *C, int m, int n, int l);
void    lina_add(double *A, double *B, double *C, int m, int n);
void    lina_scale(double *A, double *B, double k, int m, int n);
void    lina_transpose(double *A, double *B, int m, int n);
double *lina_loadMatrixFromStream(FILE *fp, int *width, int *height, char **error);