The next International Category Theory Conference CT2025 will take place at Masaryk University (Brno, Czech Republic) from Sunday, July 13 and will end on Saturday, July 19, 2025. Brno is a beautiful ...

Abstract: For several years I ran a blog called Visual Insight, which was a place to share striking images that help explain topics in mathematics. In this talk I’d like to show you some of those ...

Mar 7, 2025 I’m giving a talk next Friday, March 14th, at 9 am Pacific Daylight time here in California. You’re all invited! (Note that Daylight Savings Time starts March 9th, so do your calculations ...

This seems to represent quite a small proportion of all finite groups, counted by order, even ignoring the p p-groups. And this phenomenon of needing roots of unity to define representations is not ...

Despite the “2” in the title, you can follow this post without having read part 1. The whole point is to sneak up on the metricky, analysisy stuff about potential functions from a categorical angle, ...

Earlier this month the Mathematics Institute at Uppsala University hosted a conference called Categorification in Algebra and Topology, clearly a theme close to our collective heart. As yet there are ...

Feb 26, 2025 Potential functions from a functorial perspective.

In the beginning, there were hardly any spaces whose magnitude we knew. Line segments were about the best we could do. Then Mark Meckes introduced the technique of potential functions for calculating ...

This is the homepage for the UT Geometry and Quantum Field Theory Seminar. At the organizational meeting we will flesh out the details of our plans for the semester. Below are some suggestions to get ...