John Baez, physicist, writes on ecology and mathematical physics.
Azimuth's Latest Posts
guest post by Blake Pollard What comes to mind when you hear the term ‘random process’? Do you think of Brownian motion? Do you think of particles hopping around? Do you think of a drunkard staggering home? Today I’m going to tell you about a version of the drunkard’s walk with a few modifications. Firstly, […]
Since I was in Banff, my student Franciscus Rebro took over this week and explained more about cospan categories. These are a tool for constructing categories where the morphisms are networks such as electrical circuit diagrams, signal flow diagrams, Markov processes and the like. For some more details see: • John Baez and Brendan […]
Last time I came close to describing the ‘black box functor’, which takes an electrical circuit made of resistors and sends it to its behavior as viewed from outside. From outside, all you can see is the relation between currents and potentials at the ‘terminals’—the little bits of wire that poke out of the black […]
I’m having a great time at a workshop on Biological and Bio-Inspired Information Theory in Banff, Canada. You can see videos of the talks online. There have been lots of good talks so far, but this one really blew my mind: • Naftali Tishby, Sensing and acting under information constraints—a principled approach to biology and […]
I’m giving a short 30-minute talk at a workshop on Biological and Bio-Inspired Information Theory at the Banff International Research Institute. I’ll say more about the workshop later, but here’s my talk: • Biodiversity, entropy and thermodynamics. Most of the people at this workshop study neurobiology and cell signalling, not evolutionary game theory or […]
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