i've been learning it by reading. first l'étranger, now this and some other miscellaneous novels i got for cheap

please add me to this ping cluster as well

about to embark on this oral history of the end of the ussr

ask it about how dust theory relates to your thing

intuition in head is so goated. a bird in the hand, etc

... 'A then B' gives a different result than 'B then A'. once you accept that you can add and multiply measurements, that they're noncommutative, and a notion of 'size' tied to the physical probability of measurements, you basically have to use C*-algebras.

2. In classical physics, observables are just functions, i.e. you can ask "what is the position of this particle" and there's a definite answer sitting there. QM forces you to accept that measuring participates in determining the outcome, and measurements can fail to commute. ...

...affecting the physics. but if you do that, something has to connect your choice here to your choice there. that thing is called the electromagnetic field potential and it lives on a principal bundle. and it is the object from which the electric and magnetic fields come from.

1. the universe has symmetries, but it's more subtle than just "shift the origin by 1 lol". that's a global symmetry. for example, an electron's wavefunction assigns a complex number to every point in space. you can actually rotate the complex numbers differently at each point in space without...

as for why, i'm venturing beyond my domain, but physics is basically about two questions:
1. what is the world made of, and how does it change?
2. how do we know anything about it?
the answer to 1 is principal bundles, and the answer to 2 is C*-algebras, roughly.

yes. this usually happens when the subject is pedagogically prior to something pertinent i already know, or if the subject is in a slightly different field

they help a moderate to large amount when the thing you're reading about is an instance of something you already know but the author couldn't assume that the audience already knows. otherwise they only help a little

it may appear that way but it's only ways off in how they describe these things in an introductory course. electromagnetism for example is a principal U(1)-bundle

me too honestly. i tried to read connes's noncommutative geometry book to understand von neumann algebras and immediately bounced off. maybe one day

The Mechanical Universe - YouTube “The Mechanical Universe,” is a critically-acclaimed series of 52 thirty-minute videos covering the basic topics of an introductory university physics course...

for tiny babies who aren't ready to internalise the two actual objects of physics, C*-algebras and principal bundles, this video series is quite fun: www.youtube.com/playlist?lis...

greg egan dust theory

i thought the running gag was that grace coded every feature

thank you @gracekind.net

you haven't liked and reposted and (qt'ed with various relevant bisks) my latest post yet bro

@norvid-studies.bsky.social the longue durée view of the norvisphere

you're married‽ i thought you were in your early 20s

cat reading newspaper i should start doing that

oh, by "all ai all the time" i meant that almost all of the posts i see on my feeds are about ai

oh right, i forgot to reply to this. idk, twitter has been write-only for me for quite a while and i don't find my bsky feeds that interesting. it's all ai all the time. maybe i should try out one of those custom feed things

hi norvid

i also pop in the occasional norv when it's too dense with your analogical phrases

great topics for a primary school course in neuroscience

leprous

There's a good joke about non-constructive proofs