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Kai

@kaichung.bsky.social

Condensed matter theorist, math hobbyist

408 Followers  |  819 Following  |  233 Posts  |  Joined: 26.07.2023  |  2.8488

Latest posts by kaichung.bsky.social on Bluesky

Six months ago we got RFK Jr. Personally I don't think people forgot

11.11.2025 07:00 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Senate Democrats are the only group of people in America that could look at the election results from *less than a week ago* and conclude, β€œAh, what the people want now is for us to roll over and show our bellies to the reactionary creeps”

10.11.2025 05:01 β€” πŸ‘ 1254    πŸ” 240    πŸ’¬ 24    πŸ“Œ 3

This hurts my brain

09.11.2025 21:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Dear lord

09.11.2025 08:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Begrudgingly yes

08.11.2025 23:37 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Preview
Rosalind Franklin - Wikipedia

Obligatory citation to Rosalind Franklin in the case at hand

en.wikipedia.org/wiki/Rosalin...

08.11.2025 22:41 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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Why does this look like an LLM summary

08.11.2025 09:56 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Probably not localized to physics I suppose, c.f. recently deceased Watson and his race shit

08.11.2025 09:45 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

I do want to know why this happens to a lot of ageing physicists. I guess mostly it happens to ones who were once acclaimed but are past their prime and get stuck on some pet theory. But I know it can happen to some who were never that famous to begin with.

08.11.2025 09:44 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Heard the phrase "the future is as bright as the stars at night" and I'm not sure exactly what magnitude this simile is meant to convey

07.11.2025 00:53 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Thus, by preventing transgender Americans from obtaining gendor-congruent passports, the Government is doing more than just making a statement about its belief that transgender identity is β€œfalse.” The Passport Policy also in- vites the probing, and at times humiliating, additional scru- tiny these plaintiffs have experienced. Given this, it is no surprise that each of the plaintiffs credibly testified that they would experience significant anxiety and fear for their safety if required to use passports that reflect their sex assigned at birth rather than their gender identity. Absent an injunction, the plaintiffs and the classes of transgender Americans they represent are forced to make a difficult choice that no other Americans face: use gender-incongruent passports and risk harass- ment and bodily invasions, on the one hand, or avoid all ac- tivities (travel, opening a bank account, renting a car, start- ing a new job) that may require a passport, on the other. The harm to these individuals from having to make that choiceβ€”before their legal challenges have even been re- solvedβ€”is palpable.

Thus, by preventing transgender Americans from obtaining gendor-congruent passports, the Government is doing more than just making a statement about its belief that transgender identity is β€œfalse.” The Passport Policy also in- vites the probing, and at times humiliating, additional scru- tiny these plaintiffs have experienced. Given this, it is no surprise that each of the plaintiffs credibly testified that they would experience significant anxiety and fear for their safety if required to use passports that reflect their sex assigned at birth rather than their gender identity. Absent an injunction, the plaintiffs and the classes of transgender Americans they represent are forced to make a difficult choice that no other Americans face: use gender-incongruent passports and risk harass- ment and bodily invasions, on the one hand, or avoid all ac- tivities (travel, opening a bank account, renting a car, start- ing a new job) that may require a passport, on the other. The harm to these individuals from having to make that choiceβ€”before their legal challenges have even been re- solvedβ€”is palpable.

Jackson's dissent, joined by Sotomayor and Kagan, says the evidence showed that gender-incongruent passports led to humiliating, invasive searches of trans Americans (including strip searches) since their gender marker didn't align with their appearance. The policy is both cruel and irrational.

06.11.2025 20:20 β€” πŸ‘ 775    πŸ” 173    πŸ’¬ 7    πŸ“Œ 7

Both but also (d) "pretend that it's normal"?

06.11.2025 17:23 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Dear lord I haven't graded anything since a while before LLMs, it must be awful now

06.11.2025 17:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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When physical solutions to the equations of motion cease to exist

06.11.2025 17:08 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Okay but imagine pizza toppings on top of fries. That sounds delicious actually

06.11.2025 05:53 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
Opinion | Mamdani’s Victory Is Less Significant Than You Think

The New York Times quickly sending out Douthat to argue that Mamdani’s victory doesn’t really matter is so predictable it borders on self-parody.

Remember, folks: Every time the Right wins an election, it’s an undeniable expression of the will of the people. If a lefty wins, it’s just a blip.

05.11.2025 17:27 β€” πŸ‘ 8588    πŸ” 1851    πŸ’¬ 265    πŸ“Œ 134

Pretty sure this was a general sentiment that undermined Hillary Clinton during her presidential campaign, that she stood for nothing in particular and changed her positions based on the shifting of the political winds. I don't have any faith that current leadership will learn a lesson though.

05.11.2025 16:41 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

hearing reports that woke guillotines are at this very moment trundling across times square

05.11.2025 03:49 β€” πŸ‘ 13    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0

Been waiting to hear this for weeks! Honestly one of the best political developments in my lifetime. Every Democrat should be falling over themselves trying to mimic Mamdani's political style. it's insane the amount of headwind he is getting from Dems, and successfully overcoming!

05.11.2025 02:57 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

It's also the generator of the Lie algebra or R, no? So this is the exponential map from Lie algebra generators to Lie group translations

03.11.2025 23:49 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Yeah exactly lol

03.11.2025 23:39 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

A bit obvious after learning about Lie groups and the exponential map

03.11.2025 23:35 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I just was reminded of when I realized you can write the Taylor series this way and that this is why people say that momentum is the generator of translations! Blew my mind at the time

03.11.2025 23:20 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

I prefer

f(x+c) = exp(c βˆ‚_x) f(x)

:)

03.11.2025 23:02 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Comment section like on YouTube videos?

03.11.2025 21:19 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Thank you!

03.11.2025 06:40 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thanks!

03.11.2025 05:40 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

That's a great idea

03.11.2025 04:36 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Before and after on my haircut

03.11.2025 04:33 β€” πŸ‘ 8    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

Yes please!

02.11.2025 23:04 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

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