Copasetic Flow

 This blog was mentioned by GPT5 in its answer to my somewhat obsure question about special relativity! Here's the question. Yes, I did already know the answer, I was just taking GPT5 as a research tool out for a spin after reading Simon Willison's GPT-5 aka Research Goblin  post . The answers it came back with were spot on. They highlighted Kerapatoff's involvement which I find particiularly interesting. Then, when I scrolled, (very far down), it's cited sources, I saw... in the 'More' section... As it turns out, the 'More' panel was intended as a 'You might find this intereseting' sort of thing. So, it's cool to see the blog on GPT-5, but GPT-5 didn't actually use the blog. AI and its sourciness (to coin a term) have come up a recently on the SolderSmoke blog. OK, off to listen to some recorded QSOs!

Back in December I posted a picture of the poster that I was taking to the Dallas Astrophysics Symposium.  Lots of people asked what it all meant and I promised I’d answer eventually.  Well, I've finally found the time to at start expanding on the poster in small chunks.  The following is a first attempt and will make far more sense to physicists than it will to anyone else, (at least I hope it’ll make sense to someone)..  I’m using these posts as a practice ground for explaining these concepts simply and the explanations should get better as time progresses.  In the meantime, thanks for being my practice audience if you decide to read this!  If you have questions, please ask them, and if you can see an obviously better way of expressing the ideas, and you’d like to share it that would be awesome and help a lot! Physicists in the early 1900s defined a quantity called rapidity that serves as a way of measuring how fast a particle is traveling in spec...