702 Phillips Hall
Department of Mathematics
801 22nd St. NW
George Washington University
Washington, DC 20052

: 202-994-6235
Fax: 202-994-6760
Math Department: 202-994-6235
Email: robinson at gwu dot edu

Chair Tiling

This animation shows the tiling substitution producing the “chair” tiling. It is an example of a constant “size” substitution with a “coincidence”. As a result this tiling has discrete diffraction spectrum. See the paper “On the table and the chair”  Indag. Math 10, 1999.

✤  Deputy Chair, Mathematics
✤ Faculty Senate Physical Facilities Committee

Courses (Spring 2018):

  Math 1000-10 (37355),  Math and Art: MW 9:30-10:50 am, Duques 250.
Math 6226-10 (37368),  Dynamical Systems and Chaos: MW 12:45-2:00 pm, 1957 E 315.

My research is on ergodic theory and dynamical systems, especially the application of these subjects to tilings, quasicrystals, and numeration. See my papers and old lectures (and other used items) for more details.

I am also interested in applications of mathematics to politics. My book (right) coauthored with Dan Ullman, recently cam out in its 2nd edition!