dont take my X super seriously unless you can actually handle it 😉 physicist and gambler
Joined July 2025
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J retweeted
'I was delighted..about the Nobel Prize, thinking as you did that my bongo playing was at last recognised.
Imagine my chagrin when I realised that there had been some mistake: they cited some marks I made on paper ..and not one word about percussion technique'
-Richard Feynman
J retweeted
The US dropped not one, but two nuclear bombs on Japan and they have more affection and appreciation for us than any other country on earth, including Europe
Japan is actually our greatest ally, and it’s not even close
🇯🇵 🫱🏼🫲🏻 🇺🇸
JUST IN: Japan declares its friendship with the U.S. is “stronger than ever” as it gifts an additional 250 cherry blossom trees.
Readers added context they thought people might want to know
Stating this is “Just in” and using this image are misleading. Japan’s current Prime Minister Sanae Takaichi announced this gift in October 2025.
thehill.com/homenews/admin…
The man depicted in the included image is the late and former Prime Minister Shinzo Abe who was assassinated in 2022.
J retweeted
Five dimensional chess doesn’t exist. Everyone is furiously improvising all the time. The future is utterly uncertain.
J retweeted
💫
SpaceX has cool star names for stuff.
• Starfall: Will enable access to microgravity environment for scientific research & in-space manufacturing
• Stargaze: Tracks objects in orbit to prevent collisions
• Starshield: Secured satellite network designed specifically for government, military, and intelligence agencies
• Starbase: Official incorporated city and private spaceport located in Boca Chica, Texas
• Starfactory: 1+ million-square-foot advanced manufacturing facility located at Starbase
• Starship: Largest and most powerful rocket ever
• Starlink: Satellite internet constellation
J retweeted
Happy Father’s Day to all the dads and grandfathers out there helping inspire and prepare the explorers, builders, and dreamers of tomorrow. The future Starfleet is going to need a lot of recruits!
J retweeted
💬Eric Weinstein: "Estamos aferrándonos a una idea ingenua del capitalismo, donde 5 personas van a agarrar toda la humanidad y decidan que es suya. ¡Defiéndanse! Sam Altman o Elon Musk no son dueños de esto. Y si esto rompe el capitalismo, que se rompa".
🗣@ericweinstein x @santisiri
J retweeted
Sound synchronized from @NASASpaceflight footage
J retweeted
I use AI every single day so I'm definitely not against AI. I think it's one of the most powerful tools humans have ever created but I do think there's a big difference between using AI to help you think better and using AI so you don't have to think at all.
Especially with mathematics I don't think the point is only to get the answer as fast as possible. A big part of the value is what happens to your mind while trying to understand something. When you struggle with a problem, make mistakes, fix your reasoning, and slowly build intuition, you're not wasting time, you're training your brain.
J retweeted
The SpaceX team is incredible!
SpaceX is such a bad ass company. In their IPO filing, they wrote this:
• The first private company to develop and launch a liquid-fuel rocket to reach orbit (2008)
• The first private company to successfully dock a private spacecraft with the International Space Station (2012)
• The first to successfully propulsively land (2015) and refly orbital-class rocket boosters (2017)
• The first to begin deploying a large-scale LEO broadband satellite constellation (2019);
• The first private company to transport astronauts to orbit, returning America's ability to fly astronauts to and from the International Space Station (2020)
• The first to manufacture consumer-grade phased-array user terminals at scale (2022);
The first to deploy a large-scale LEO satellite-to-mobile constellation (2025)
• The first to build a gigawatt-scale Al training cluster and largest coherent supercomputer (2026)
• The first gigawatt-scale Megapack battery installation (2026); and
• The only company capable of building orbital AI compute at scale.
BOOM.
J retweeted
draw any loop on a circle. that loop is secretly an integer.
take a circle, pick a point, and draw a loop that starts and ends there. you can describe the whole loop by how many times it wraps around on its way back. once clockwise is +1. twice is +2. counterclockwise gives negatives. no wrap is 0.
here's the move. in topology, two loops are "the same" if you can smoothly deform one into the other. and once you allow that, everything about the loop washes out except the winding number. how wiggly it is, where it bunches up, none of it survives. only the wrap count.
so the set of essentially different loops on a circle is just the integers. an infinite topological universe collapses to ℤ.
this is the fundamental group of the circle. π_1(S¹) ≅ ℤ. one of the cleanest theorems in topology, because it takes a continuous question (which loops can deform into which) and gives a purely discrete answer (count the wraps).
J retweeted
Almost every part of Starship V3 is different from V2
Starship Flight 12 goals:
• Debut next-generation Starship and Super Heavy vehicles
• First launch from Starbase’s newly redesigned launch pad
• Demonstrate upgraded Raptor engines in flight
• Deploy 20 Starlink simulators and 2 modified Starlink satellites
• Test in-space Raptor relight
• Evaluate heat shield performance and tile damage scenarios during reentry
• Perform experimental reentry and maneuvering tests
• Offshore splashdown attempt for the redesigned Super Heavy booster
J retweeted
it would appear i have solved the main computational dynamics problem i had deemed worth caring about in 2026 so far and my birthday is in 4.25 hours so that's very good timing.
J retweeted
writing a book; like serge lang: to learn a new topic; but by simply telling the ai you do not understand a passage until it becomes intelligible to your ignorant self
J retweeted
P(A) = 1 doesn't mean A is guaranteed.
if you pick a number uniformly between 0 and 1, the probability it's irrational is 1, and the probability it's rational is 0. but it's still possible to pick a rational. it just happens with probability 0.
probability 1 doesn't mean certain. it means "almost surely". the exceptions exist, they just live on a set of measure zero, which probability theory treats as negligible.
even certainty comes with a margin of measure 0.
