We’re brought up to say that the dual concept of injection is surjection, and of course there’s a perfectly good reason for this. The monics in the category of sets are the injections, the epics are ...

Jan 13, 2025 01:49 Also, it seems that you didn’t explicitly show that the existence of identity functions for every set, while in the ...

Aug 20, 2012 A survey article on the formalization of aspects of quantum gauge field theory in the formal language of cohesive homotopy type theory.

Hello [email protected]. So nice of you to stop by. I'm a member of the Theory Group here at UT. I've been at UT since September 1994. Before coming here, I was an Assistant Professor in the ...

Jun 2, 2014 Summarizes the approach to coherence theorems expressed as a rectification for pseudoalgebras for a 2-monad using codescent objects, following Steve Lack.

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 ...

Apr 17, 2010 In “week295” of This Week’s Finds, learn about the principle of least power, Poincaré duality for electrical circuits — and a curious generalization of Hamiltonian mechanics that involves ...

If you have any questions or comments about this page, or about the accessibility of this site, please don't hesitate to contact the webmaster. All blog pages include a search box (AccessKey-4).