Feb 2, 2025 If you want to help save US federal web pages and databases, here are some things to do.

I hope you’ve read the news: Ethan Singer, Thousands of U.S. government web pages have been taken down since Friday, New York Times, 2 Feburary 2025. Many of the pages taken down mention DEI, but they ...

Last time, I talked about the magnitude of a set-valued functor. Today, I’ll introduce the comagnitude of a set-valued functor. I don’t know how much there is to the comagnitude idea. Let’s see! I’ll ...

In this post and the next, I want to try out a new idea and see where it leads. It goes back to where magnitude began, which was the desire to unify elementary counting formulas like the ...

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 22, 2025 Warming up to a dual concept to magnitude, with an aside on a new connection between magnitude and entropy.