![]() Spring 2021 courses: Math 139 Section 2 (8-9:15 TuTh, Remote), Section 19/W (Online), Section 20/W (Online) Math 151 Section 2 (2-3:15 TuTh, Remote) My office is | Current research: Boolean Algebras Infinite Graph Theory Set Theory 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 |