Karnaugh map torus A 4×4 Karnaugh map visualised as a torus and a plane by CMG Lee. 0000 0100 1000 0101 1101 1001 0011 0111 1111 1011 0010 0110 1110 1010 0000 0100 1100 1000 0001 0101 1101 1001 0011 0111 1111 1011 0010 0110 1110 1010