So far, we've looked at the minimal basics of categories: what they are, and how to categorize the kinds of arrows that exist in categories in terms of how they…
Category Diagrams
One of the most unusual things about category theory that I really love is category diagrams. In category theory, many things that would be expressed as equations or complex formulae…
I get mail: Brown's Gas and Perpetual Motion
In the past, I've written about free-energy cranks like Tom Bearden, and I've made several allusions to the Brown's gas" crankpots. But I've never actually written in any detail about…
Category Intuition by Example
The good thing about category theory is that it abstracts everything down to a couple of very simple, bare-bones concepts, and lets us play with those concepts in really fascinating…