On November 13, 2008 I participated in the Dynamical
Systems Seminar at the University of Maryland. I gave a two-hour
talk on
** Degrees of unsolvability of 2-dimensional subshifts of finite
type**.

My abstract is available in several formats: PDF, PS, DVI, HTML, plain text. My slides are available in several formats: PDF, PS.

A list of my recent and upcoming talks is available.

My publication list is available.

t20@psu.edu / 16 November 2008