-int HL_cantor_xyp(int *xy);
-int HL_cantor_x(int cantor);
-int HL_cantor_y(int cantor);
-
-/* Isometric functions */
-int HL_cantor_ijk(int i, int j, int k);
-int HL_cantor_ijkp(int *ijk);
-int HL_cantor_i(int cantor);
-int HL_cantor_k(int cantor);
-int HL_cantor_j(int cantor);
-
-int HL_cantor_bin(double x, double y);
-
-/* A general decode function */
-int HL_cantor_decode(int can, int *x, int *y, int *i, int *j, int *k);
-int HL_cantor_arrays(int can, int *xy, int *ijk);