I'm the Associate Director of Undergraduate Studies (Teaching Faculty II) at the University of Wisconsin-Madison.

My office is located in Van Vleck 411. 

This website is infrequently updated and likely out of date in many places.

Please follow the links to the left to find out information about me. Copies of my papers are available from my publication list.

If you're looking for Applied Combinatorics by Keller and Trotter, you can find it on its own page. If you're interested in my photography, it can be found on a dedicated site.