7 Jul
2018
7 Jul
'18
10:23 p.m.
I've sent an email to Geoffrey with your question. Some more references: Grunbaum and Shepard dealt with the cases of two and some of three squares in 'Tilings and Patterns' These papers find all the cases with 3 squares https://www.infona.pl/resource/bwmeta1.element.springer-dd723cfe-ddc9-39d5-a... https://arxiv.org/pdf/1101.0223 http://emis.ams.org/journals/BAG/vol.41/no.1/23.html