Topic for September 1, 2004: Penrose Tiles
Lyman Hurd sent a marvellous submission on Penrose Tiles.
A sequence of routines is given which apply the "deflation" operator to a finite collection of Penrose Kite and Dart tiles. This procedure allows complicated tilings to arise out of simple ones. A sample notebook is provided to illustrate the operator, and several sample tilings are presented. Display routines are provided for rendering the tilings which are kept internally in symbolic form.