User:Eugene M. Izhikevich/Proposed/Penrose tilings

• Prof. Roger Penrose, Mathematical Institute, University of Oxford, UK

• Dr. Paul J. Steinhardt, Department of Physics, Princeton University, NJ

Dr. Roger Penrose accepted the invitation on 18 October 2007 (self-imposed deadline: 18 April 2008).

Dr. Paul J. Steinhardt accepted the invitation on 18 October 2007 (self-imposed deadline: 18 April 2008).