2Zisnotalatticebecauseitisnotdiscretesincep 2admitsarbitrarilygoodrationalapproximationsabtherearevaluesabp 22Gthatarearbitrarilyclosetozero 3 2 1 0 1 2 3 O Figure1Theintegerandcheckerboardl ID: 515068
2Zisnotalattice becauseitisnotdiscrete:sincep 2admitsarbitrarilygoodrationalapproximationsa=b