Summer 2021 course:

Math 139 Section 2 (Online July 6 - August 14)

My office is Laurentide 2241 in my basement, my Summer 2021 student office hours are by appointment via webex. Yes, my office has both Packers and Broncos stuff in it. Here's why. I've also traveled to 5 continents, 16 countries (or maybe 15 or 17 depending on your interpretations of Falkland sovereignty and the Antarctic Treaty), and 38 US states (plus a district and a territory), as well as some land that's not part of any country.

Current research:

Boolean Algebras

Infinite Graph Theory

Set Theory



My Mathematical Genealogy

Slides from talks:

November 17, 2012. BAs & Hypergraphs

September 20, 2017. Measuring Starlight Deflection during the 2017 Eclipse.

April 6 and 10, 2018, updated version of above at MAA-Wisconsin Section meeting. Slides and Video from UW Space Place