The Eternal Doorman

There's obviously some overlap in these fields, because physics depends upon mathematics and so you would think that anyone in one of these fields would be at least cognizant of the other, but are they? There are plenty of people who claim to have answers and they often involve computation. But why? Roger Penrose wrote his book The Emperor's New Mind : Concerning Computers, Minds and The Laws of Physics for these people, I think! In it he touches on the foundations of Mathematics too, but in a somewhat cursory way: his discussion of intuitionistic logic in that book is almost dismissive. I think it is the failure of mainstream physicists and logicians to relate these inter-dependent foundations that makes room for ideas of computation as somehow foundational in itself, rather than as a framework for effective reasoning. Here's a rather good survey of the idea of inertial frames in physics by Robert DiSalle , who is a Philosopher at UWO: Stanford Encyclopedia of Philosophy

Subscribe to Popinat . The people who own Apple? Here's one, he's a surf-bum who lives in Hawaii and does theoretical physics. He's actually quite good at it too. See https://deferentialgeometry.org/   On exotic solutions to the Einstein equations (Goedel's rotatating universe with closed time-like curves): Whilst listening to Curt's interview with Julian Barbour the other day, and thinking about Newton's bucket and Mach's principle, I came across this paper from the Romanian Journal of Physics in 2006: Modeling the Electric and Magnetic Fields in a Rotating Universe by Brindusa Ciobanu and Irina Radinschi . Julian Barbour was the person who first coined the term "Relational" with regard to ineterpretations of physical theories. See Relational Concepts of Space and Time by Julian B. Barbour published in The British Journal for the Philosophy of Science Vol. 33, No. 3 (Sep., 1982). Subscribe to Theories of Everything .

Poor things! See  Giant Oarfish in Southern California .  Subscribe to CBS8 San Diego .

Subscribe to Sabine Hossenfelder . Here's a nice post that the Nobel Prize people just did about science in India during the roaring twenties. You can read Chandrasekhara Venkata Raman 's lecture on the research that was happening at the time: https://www.nobelprize.org/uploads/2018/06/raman-lecture.pdf See also Jade on Ising Models .

This is the feature-length version, where you almost see how it ends, ... And it now has references to things I've never even heard of before. This was just the first half, or maybe it was Part I? Subscribe to Elle Cordova .

See  https://en.wikipedia.org/wiki/Ising_model and Douglas Ashton's blog post on the Renormalisation Group . Subscribe to Up And Atom . Here's Douglas Ashton's video: Subscribe to Douglas Ashton . And here's one describing the idea behind renormalisation: At 14:50 there is an interesting thing that can happen. It makes you wonder about what else could happen at critical points. See https://en.wikipedia.org/wiki/Onsager_reciprocal_relations . Subscribe to Broken Symmetries . For more on Temperature and stuff: Why I Don't Think Reductionism Should Be Part of the Physics "Package" and Angela Collier, Anne L'Huillier and Jacob Barandes on Physics .

Wow, she's really good. Shakespeare too, I suppose! She was a finalist in the World Monologue Games 2024 : Subscribe to Emily Teede . I didn't know what to do with that until I saw this: Sydney Sweeney calls out Hollywood hypocrites claiming they LOVE women! Subscribe to Yellow Flash 2 .

That's good, because the Polar Bears are going to need new jobs soon, ... Being a Polar Bear is not something that people are going to need for very long, ... See also Angela Collier, Anne L'Huillier and Jacob Barandes on Physics . Subscribe to Anastasia in Tech .

I thought I'd throw out some ideas here for anyone interested, and indeed anyone who's not interested, because maybe you are the problem! I have a lot of related projects all on the go, and maybe one day I will need to do unrelated projects for the purpose of getting money, but I hope not. These different projects all use various editors and apps opened on certain files and terminal windows in certain directories, and certain apps running in the background. The apps also may have certain privileges. Some of these projects may get left for weeks without my even looking at them and when I go back, I have forgotten what are the relevant files in the relevant directories, if I even remember the project exists, ... often I just forget I was doing it and I only rediscover the idea when I see a weirdly familiar filename somewhere and look at it and realise that I was doing that thing about graph reduction machines in ARM assembler once, ... And then I remember there were some papers I

Angela has done two really great videos in the past week or so: See Anne L'Huillier's Nobel Prize talk last year, and note the bit at the end about the time-delayed transitions from different shells: Then the day before yesterday Angela came up with this one about the sorts of physics problems that students learn to solve, and abstracted five Common Notions: So, instead of revealing unity in the fundamental laws of Nature modern physics is unfolding this enormous complexity in our different ways of describing Her. There might be a reason for this, ... Subscribe to Angela Collier . And I am one and a half hours through this really interesting interview Curt Jaimungal did with Jacob Barandes about his connection between non-Markovian stochastic processes and Quantum Mechanics. He just took a naïve approach and modeled a fundamentally stochastic measurement process which he found was non-Markovian in the sense that the transition distributions between states were not constant,

See the MBARI press release here . They only have a few of these little robotic deep-sea diving machines. Subscribe to MBARI . 

I made this video a few days ago and for some reason it got over 1,000 views. So far it has ten comments, one of which is worth responding to. It is the one asking me to suggest some imagined possible explanation of the Black-body Radiation Spectrum, other than that put up by Max Planck . I think I can do better than than that. I can suggest how you could imagine something other than the standard reductionist model which launched Quantum Mechanics. All you need to do is to imagine you are an experimental physicist like Ben Krasnow , with a laboratory and some money and the necessary skills to make your own equipment. Then what you need to do is imagine how you are going to verify the spectrum of Black-body radiation. You are going to try to make a perfectly black sphere in thermal equilibrium with its surroundings and inside it is going to be a perfectly reflective surface with one tiny hole from which it is going to radiate a beam of infrared and visible light and you are going to

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My comment : A measuring device only measures a measurable quantity though, and a probability, even if it is 1, i.e. a certainty, is not actually something you can measure directly without doing a large number of measurements and gathering statistics that represent the measured values. The super-position states can therefore never be known empirically. So when you say that "we" know the cat is both dead and alive, that is not empirical knowledge, it is deductive inference based on the theory that quantum states in a Hilbert space have some sort of physical reality independent of the actual observations that are made in a laboratory. To me this makes good sense, and it shows that the wave-function collapse is a condition of empirical knowledge. We simply cannot make sense of a measuring device that gives self-contradictory readings when used to measure some states of a system. But it is hard to make such an argument when the lecturer freely switches between speaking about a s

There's something sane and healthy-sounding about this whole thing! See Clive Newstead's book An Infinite Descent into Pure Mathematics and Egbert Rijke's Introduction to Homotopy Type Theory course at CMU https://github.com/EgbertRijke/HoTT-Intro . Unfortunately the last lines of Emily's slides aren't always visible on the video, see e.g. 35:54 . At 41:24 on the difference between the existential and universal quantifiers and the constructive sum and product types, see  Set Theory for Computer Science by Glynn Winskel and Fraenkel–Mostowski models revisited by Jindrich Zapletal. 1:01:20 On Guillaume Brunerie's theorem (There exists a natural number n such that π 4 ( S 3 ) ≃ ℤ / n ℤ .), see his PhD thesis: On the homotopy groups of spheres in homotopy type theory . And if  you wonder what it all means, like I do, see the Wikipedia article on Homotopy groups of spheres . For more on Cubical Agda, see Cubical agda: a dependently typed programming language

This should've been painted in green!

This is an exhibition at the British Library in St Pancras, London. There was a lot in this, more than I could do justice in a few hours. See these posts in the British Library blog .

After fifteen years of being easily one of her most rabid fans, I finally got to see her live, and she shone like a little beacon of hope in the dark. She presented the show as a kind of review of her 30 year career in music, and she said she wants to do another thirty years! There are still shows in Rome, Florence and Padova: see  https://laurapausini.com/en/live/laura-pausini-world-tour-2023-2024/

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Part 2: If you are interested in her live course, fill out the form at  https://forms.gle/KfQEwkh2XcKwBERm6 or go to the link in the YouTube video description . Subscribe to The Looking Glass Universe . See  Psychophysics . Here is Vandana Shiva's talk on Consciousness and Quantum Thinking: Her PhD Dissertation was entitled Hidden variables and locality in quantum theory but all I have found is an abstract. It does look rather interesting: The status of hidden variables in quantum theory has been debated since the 1920s. The author examines the no-hidden-variable theories of von Neumann, Kochen, Specker and Bell, and finds that they all share one basic assumption: averaging over the hidden variables should reproduce the quantum mechanical probabilities. Von Neumann also makes a linearity assumption, Kochen and Specker require the preservation of certain functional relations between magnitudes, and Bell proposes a locality condition. It has been assumed that the extrastatistica

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