Rochelle
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uberwensch.bsky.social
Rochelle
@uberwensch.bsky.social
like if Just Some Guy was a girl
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What is entanglement? Itamar Pittowsky claimed that these results brought us right to the precipice of logical contradiction--but not over. Abner Shimoney described it as a piece of "experimental metaphysics." I'm a nobody, but I think entanglement is the most interesting thing ever discovered.

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hey guys. i was incapacitated all day. please, please accept my apologies and submit your #MathCoffeeSelfie below.
February 8, 2026 at 10:59 PM
Reposted by Rochelle
Those who've followed me for a while will know that I'm doubtful about just how useful the notion of "expanding space" in explaining cosmic expansion is. I think the SciAm article linked here is a good example for where "expanding space" makes things more difficult than they need to be. 🧵 1/
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February 6, 2026 at 5:46 PM
how do you pronounce Choquet-Bruhat?
February 6, 2026 at 6:13 AM
who wants to write a QFT text with me
February 3, 2026 at 11:12 PM
does make me wonder what the disease vectors are for philosophical zombieism
Submitted an anonymous proposal to my department to teach a course titled "Vectors for Philosophers" and got an email the next day like "this was you weisberg right?"
February 3, 2026 at 12:10 AM
spectral sequences in prison, an analytic solution of einstein's equations in the trenches.... maybe i should get arrested or committed or
I’m sorry but I still can’t get over the fact that the analyst Jean Leray was captured by Nazis in 1940 and knew it was time to become Goblin Wizardman & this is why the world contains sheaves
February 2, 2026 at 5:53 PM
This analogy that Witten develops (pages 7-12) is very very helpful to me. He picks extremely concrete, infinite-dimensional systems w inseparable Hilbert spaces and shows what kind of choices & additional data is involved in extracting a choice of separable subspace therefrom
Why Does Quantum Field Theory In Curved Spacetime Make Sense? And What Happens To The Algebra of Observables In The Thermodynamic Limit?
This article aims to explain some of the basic facts about the questions raised in the title, without the technical details that are available in the literature. We provide a gentle introduction to so...
arxiv.org
February 1, 2026 at 11:27 PM
Reposted by Rochelle
why can we assume that the electron wavefunction is supported in (concentrated in) the green area? in particular, disjointly from the solenoid.
February 1, 2026 at 9:01 PM
Reposted by Rochelle
given that we missed last week, this #MathCoffeeSelfie is a double. send two pictures, tell me what you've been up to twice, and drink 2× the coffee.
February 1, 2026 at 5:17 PM
refreshing (what has become) the Epstein Files Website, looking at my bookshelf, refreshing again,
February 1, 2026 at 6:57 PM
given that we missed last week, this #MathCoffeeSelfie is a double. send two pictures, tell me what you've been up to twice, and drink 2× the coffee.
February 1, 2026 at 5:17 PM
Reposted by Rochelle
pressing the button that makes life worth living
January 31, 2026 at 10:43 PM
would you believe it if i told you that the discussion of ICE on BoardGameGeek.com is... not particularly enlightened
January 31, 2026 at 9:38 PM
i am under the impression that a lot of people are not moved by Jaynes' arguments (that thermodynamical entropy is information entropy), but what are some good responses to him?
January 31, 2026 at 8:32 PM
women only love diamonds in this world. they love squares in all worlds.
January 29, 2026 at 7:45 PM
is there a renormalization scheme that takes the spacetime support of the interaction to be compact, and then enlarges it? would this work?
January 29, 2026 at 7:10 PM
Reposted by Rochelle
Huh, I don't remember having that conversation!

Weyl classified finite-dimensional irreps of GL(n,R), and these correspond to irreducible "tensor densities" of various kinds. Indeed, there's a kind that you can integrate over a (n-1)-dimensional-surface with oriented normal bundle.

(1/n)
January 27, 2026 at 1:21 AM
damn, i think i looked really hot in that picture with stalin. i can't wait till he posts it on his instagram.
January 27, 2026 at 4:27 AM
Reposted by Rochelle
(butting into a conversation) heh. that's a pretty good layman's explanation. but actually "particles" aren't real. *pushes up my glasses* see the universe is actually uhm. its.. uh. it's this kinda... uhm. it's some kind of. y'know. fucked up math thing. waves and shit
January 27, 2026 at 2:56 AM
I think I have been grappling with something similar: the question of whether E&M "uses" a spacetime orientation or not.

The Maxwell equations are dF=0 and d * F = * J, (* the Hodge star)

so a choice of orientation threatens to enter via *. However, the alternate choice should scale the equation
The ongoing discussion on MathOverflow on whether it is possible to define the trace of a linear map (on a finite-dimensional vector space over a field) without “picking a basis” — or what this phrase even means — is mathematically and sociologically fascinating: mathoverflow.net/q/507049/17064
Precise meaning of "picking a basis"?
Some years ago, Kevin Buzzard wrote a blog post asking whether the trace of a linear map $\phi \colon V \to V$ on a vector space $V$ can be defined "without picking a basis." He had some ...
mathoverflow.net
January 26, 2026 at 11:40 PM
I am familiar with the theoretical side of this result but I have always wondered how tf did they experimentally measure this so precisely?
In the years since Kusch’s work, precision measurements of the electron magnetic moment have determined its g-factor to 12 or 13 decimal places.

That’s like measuring the circumference of the Earth’s equator with a precision comparable to the width of a human hair. (14/n)
January 26, 2026 at 5:21 PM
i can't do this i do not understand what is going on
Guy teaching Advanced QFT this term is using dimensional regularization. Is there anything rigorous about this? I would be interested to know.
January 26, 2026 at 5:11 PM
Reposted by Rochelle
This change in healthcare coverage by the PHSA is going to cost trans people their lives

If you're in BC, please contact your local MLA and tell them something needs to be done about this

The Vancouver clinic has double the wait time of GRS Montreal, and cutting it off will only make it worse
jfc british columbia is closing funding for grs montreal

the vancouver program has a far longer waitlist, and less experienced surgeons

what the fuck this is actually bullshit why are they making what little options we have so much harder
January 23, 2026 at 9:10 PM
i don't understand why i have so many useless muscles in my face that don't have any purpose but are always on a hair trigger to wrinkle up my forehead and shit. and i just have to consciously avoid it, forever.

sorry, what? whats an expression?
January 25, 2026 at 7:44 PM
everything i know is basic, so i shouldn't feel pride in knowing it, but everything i don't know is also basic, so i should feel shame in not knowing it
January 25, 2026 at 7:43 PM