Date: Thu, 25 Mar 2010 10:32:33 -0700 Subject: Penrose Tilings - Grunbaum-Shephard Theorem 10.6.1 From: Noah Davidson <davidson@reed.edu> I am studying Penrose tilings and Ammann bars for my undergraduate thesis. After some thought, the proof of Grunbaum-Shephard Theorem 10.6.1 is giving me trouble. If someone on this list has thought carefully through the argument and is willing to discuss it with me briefly off list, I would be grateful. Thanks you kindly, Noah Davidson