Perfect colorings of $Z^2$: Nine colors

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/214061We list all perfect colorings of $Z^2$ by 9 or less colors. Keywords: perfect colorings, equitable partitions177 pages (large Appendix). !Attention: .ps is 17Mb, .pdf is 1.6Mb, archived source is 40kbCombinatorics05B30; 05C15Perfect colorings of $Z^2$: Nine colorstext