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Leon Rofagha

@leonrofa.bsky.social
190 followers 230 following 171 posts

σ-algebra hobbyist

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Leon Rofagha @leonrofa.bsky.social · 28/09/2026
European industry is doing better than you may think economist.com/business/202...
economist.com
European industry is doing better than you may think
The firms most exposed to China are suffering. But many are adapting
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Leon Rofagha @leonrofa.bsky.social · 27/09/2026
And so it starts. I hope the incentives change quickly enough!
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FX Coudert @nanoporous.net · 25/09/2026
“Using a train, a professor ran 800 km in three hours.”
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Leon Rofagha @leonrofa.bsky.social · 25/09/2026
youtube.com
ICM 2026 Invited Section Lecture - Rina Foygel Barber
YouTube video by Simons Foundation
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Leon Rofagha @leonrofa.bsky.social · 20/09/2026
riannedeheide.github.io
During your PhD: learning to do research — Rianne de Heide
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Leon Rofagha @leonrofa.bsky.social · 18/09/2026
reuters.com
EXCLUSIVE: Anthropic quietly sets up biology lab as it ramps AI drug program
At a time when fears of AI are gripping the public, the startup has built a wet lab — or ​place for physical experiments — in the San Francisco Bay Area, two people familiar with the matter said.
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Leon Rofagha @leonrofa.bsky.social · 18/09/2026
Such a great write-up
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Leon Rofagha @leonrofa.bsky.social · 17/09/2026
youtube.com/live/ypBsP6a...
youtube.com
CLIMB + Neyman talk with Daniela Witten
YouTube video by Climb Seminars
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Sam Power @spmontecarlo.bsky.social · 16/09/2026
(from www.its.caltech.edu/~matilde/AIm..., links to .pdf)
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Daniel Litt @littmath.bsky.social · 14/09/2026
I've written an essay on how I think the mathematics profession should adapt to highly capable AI systems. It's hosted here on "Proofs and Prompts": proofsandprompts.com/2026/09/14/a... though you should also feel free to complain/comment on my website here: daniellitt.com/blog/2026/9/...
proofsandprompts.com
A beginning for mathematics
Daniel Litt, professor at the University of Toronto Three years ago, AI systems could not reliably add two numbers. A year ago, internal models at OpenAI and DeepMind received the equivalent of a g…
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Terence Tao @teorth.bsky.social · 11/09/2026
A group of 25 Fields Medalists, including myself, have made a joint declaration on Math and AI: mathandai.org . We welcome additional signatories. See also this article in the Economist announcing the declaration: www.economist.com/science-and-...
mathandai.org
Declaration — Math and AI
Read the declaration and add your name.
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Leon Rofagha @leonrofa.bsky.social · 11/09/2026
An interesting read on software production at technology companies. The upshot seems to be that AI does almost all of it and engineers only review particularly risky snippets?
newsletter.pragmaticengineer.com
What is happening with code reviews?
AI generates more code than devs can track in 2026, so will the code review process have to adapt – or is it doomed? A look into this decades-old practice and the approaches that could replace it
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Leon Rofagha @leonrofa.bsky.social · 11/09/2026
It seems plausible to me that statistics, computer science and related disciplines will get more mathematical over the coming years as “pure” mathematicians whose funding has dried up find refuge there
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Grant @syncingsinking.bsky.social · 10/09/2026
This is just to say I have solved the open questions that were in your paper and which you were probably saving for your phd students Forgive me they were delicious so incentive-laden and followed so readily once your postdoc's drafts mysteriously found their way into my training data
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post malone ergo propter malone @proptermalone.bsky.social · 09/09/2026
Anthropic doesn’t have enough compute to service demand; OAI may be demand-bound instead. if so then they’re in a position where they have however much excess capacity and they just need to find the best thing to throw it at, over and over again
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Eugene Vinitsky 🍒 @eugenevinitsky.bsky.social · 09/09/2026
Hey buddy you got any breakthrough proofs you’re working on? No reason, me and my large corporation are just curious
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John C. Baez @johncarlosbaez.bsky.social · 06/09/2026
Joan Birman is amazing! www.nytimes.com/2026/09/06/s...
nytimes.com
The 92-Year-Old Mathematician and the Teenage Apprentice (Gift Article)
Joan Birman thought her major discoveries were behind her. Then came an email from a young neighbor — a girl who knew little but wanted to learn.
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Leon Rofagha @leonrofa.bsky.social · 04/09/2026
The trivialisation of programming is perhaps one bright spot of the effects of AI in research for me. I never enjoyed it and was always terrible at it
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Kyle Cranmer @kylecranmer.bsky.social · 02/09/2026
Comments: 32 pages, human work 😜
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Andrea Matranga @andreamatranga.bsky.social · 29/08/2026
My German Applied Microeconomist costume this year will be lit
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Clément Canonne @ccanonne.github.io · 08/08/2026
David Pollard has a new draft, "Probability tools, tricks, and miracles" (last updated June 2006). Lots of good things in there, from a quick skim! And, if nothing else, worth reading for the quality of the writing and the exposition choices and notes. www.stat.yale.edu/~pollard/Boo...
From the first chapter of the draft {"How I chose material for this book"):

I strongly believe in the value of seeing how an idea can develop from
an initial brilliant insight (a ‘miracle’) to a ‘trick’ (a method known to,
and often developed by, a few experts) to a ‘tool’ (a method that is well
understood and can be applied in settings, even those unsuspected by its
inventors). Indeed, one of the great pleasures in my research life has been
the progression from first wondering how anyone could have such a clever
idea to the final realization that everything depended on only a few stunning insights.
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a hangry mouse @oscillatory.net · 07/08/2026
sorry for accidentally inventing a swarm of cybersecurity demons, but now that it exists, the only way to stop a bad swarm of cybersecurity demons is a good swarm of cybersecurity demons
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Aaron Roth @aaroth.bsky.social · 07/08/2026
People used to be able to impress and intimidate reviewers with complicated proofs. This will change. In the age of AI inscrutable proofs are cheap. It is understandable proofs that are valuable. Opaque complexity is now it is a sign of laziness or lack of insight.
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Leon Rofagha @leonrofa.bsky.social · 05/08/2026
Super interesting. “The point is that there are so many ways in which a result can be strengthened that it is hard to know in advance in which direction you should go. With the benefit of hindsight, it could have been done [by a human mathematician].”
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Mark M. Wilde @markwilde.bsky.social · 04/08/2026
why would I ever again share a well formulated open research question in an open problems session of a conference?
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Mark Riedl @markriedl.bsky.social · 03/08/2026
This paper prompted Jack Clark, one of the co-founders of Anthropic to post this to their news letter: "the singularity could be delayed" (as a reminder: always be wary of statements from people who work in corporate AI labs--their livelihood depends on certain outcomes and beliefs)
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Greg White @gregswhitenoise.bsky.social · 01/08/2026
Don't forget (a) heavy subsectioning; (b - i; ii) overly emphatic adjectives and adverbs; (c) referencing expressions with (...); (d) insane use of display math; or (e) introductions written in the stylistic equivalent to the colour grey. Every day seeing this state of affairs worsen makes me sad.
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Henry Yuen @henryyuen.bsky.social · 01/08/2026
Some initial thoughts, and a complicated mix of feelings. Wow. I mean, Erdos problems are cool (I genuinely mean that), I didn't know about the Jacobian conjecture before it got disproved. But this newest batch from OpenAI hits home in a way the previous announcements did not.
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Ulrike Franke @rikefranke.eu · 01/08/2026
“Zusammenfassung: Die Europäer haben auf eine Bedrohung von außen nicht gemeinsam reagiert, sondern sind übereinander hergefallen. Der gestrige Tag war ein schwarzer Tag für Europa und ein Fest für seine Feinde.” www.zeit.de/politik/2026...
zeit.de
Ceuta: Ein Fest für die Feinde Europas
Die Reaktionen auf den Ausnahmezustand in Ceuta? Teils faktenfreies Spanien-Bashing. Man muss festhalten: Friedrich Merz fiel hier beinahe positiv auf.
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K @kate10010.bsky.social · 31/07/2026
-67%. Still up close to 100% ytd lol.
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Robin Wigglesworth @robinwigglesworth.ft.com · 30/07/2026
FT scoop: Citadel buys Situational Awareness equity holdings after steep AI losses www.ft.com/content/5fb4...
ft.com
Citadel buys Situational Awareness equity holdings after steep AI losses
Deal comes after Leopold Aschenbrenner’s investment firm held overnight crunch talks with investors
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Nalini Joshi @monsoon0.bsky.social · 29/07/2026
There’s a lovely video of Hong Wang from IHES, which is much happier than the one I saw at the #ICM2026 Fields medallists ceremony 📽️ youtu.be/3s35qhi_inU?...
youtu.be
Hong Wang, professeure permanente en mathématiques à l'IHES
YouTube video by Institut des Hautes Etudes Scientifiques (IHES)
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Leon Rofagha @leonrofa.bsky.social · 28/07/2026
This is (selfishly) a worry of mine. Doing things is now trivial and understanding is what enables valuable contributions. In this regime having had 20 years to develop intuition about a subject is an enormous advantage
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Purva Thakre @purva.bsky.social · 28/07/2026
😲
Use of artificial intelligence.  We are living in strange times. I do not claim to be the first author of this paper; rather, what best describes the situation is that I acted as a busy supervisor giving rough directions to an interesting problem to a student who is brighter and much, much faster than me. A student who then came up with the right proof ideas and fully executed them, wrote the paper and revised it under my guidance. I did not touch any of the writing directly (except for this disclaimer and the acknowledgements) but had the student implement changes according to my feedback, leaving this manuscript in their unique style — as I would usually do. I convinced myself to the best of my ability that all the statements and proofs are correct and checked all the references. The student, in this case, is Claude by Anthropic. The result is interesting enough to deserve wider attention (in my humble judgement), but it is unclear if the standard ways of disseminating work are still appropriate when so much of it is done by artificial intelligence. We will have to decide this as a community; for now, I defaulted to treat this as if it were a normal paper.
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Sung Kim @sungkim.bsky.social · 26/07/2026
Professor Hong Wang, a Fields Medalist, the highest honor in mathematics, has taken on an unexpected new role: fashion influencer.
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Ryan O'Donnell @booleananalysis.bsky.social · 24/07/2026
This new 'journal for talks' looks pretty cool: www.mathematicaldiscourse.org
mathematicaldiscourse.org
Mathematical Discourse - Mathematical Discourse
A peer-reviewed video journal for mathematical research talks.
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Leon Rofagha @leonrofa.bsky.social · 24/07/2026
I’ve just discovered this super interesting exchange between Daniel Litt and Jacob Tsimerman xcancel.com/littmath/sta...
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Leon Rofagha @leonrofa.bsky.social · 24/07/2026
“In fact during the workshop I learnt from Harvard PhD student Bryan Wang that Harvard were already giving free Fable access to all PhD students, post-docs and faculty at Harvard.”
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John C. Baez @johncarlosbaez.bsky.social · 24/07/2026
A really good mathematician told me Anthropic is paying people like him $250/hour to improve Fable by throwing hard math problems at it. They also get a separate account where they can use Fable for their own purposes. They can do it for 5 months maximum.
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Leon Rofagha @leonrofa.bsky.social · 23/07/2026
I’m a sucker for these videos presenting the medalists
youtube.com
2026 Fields Medal: Hong Wang
YouTube video by Simons Foundation
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Xanthe van Otterburn 🦦️🍇️ @satyrs.eu · 23/07/2026
Meme of the Turkish shooter guy from the Paris Olympics — on the left, his competitor, kitted out with scopes and advanced gear, captioned with the long and winding prompt to get Fable to disprove the Jacobian conjecture; on the right, him, wearing only his prescription glasses to help, captioned "You should do a breakthrough"
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Quanta Magazine @quantamagazine.org · 19/07/2026
An unorthodox solution to a major math problem came from an unorthodox place: a teenager who, after finding homeschooling confining, found her way to research mathematics.
youtube.com
How a High School Student Overturned a Famous Conjecture
When Hannah Cairo was a 17-year-old high school student, she did something mathematicians had been unable to do for four decades: she overturned the Mizohata-Takeuchi conjecture, a famous prediction…
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Leon Rofagha @leonrofa.bsky.social · 14/07/2026
Publication date: tomorrow! Can’t wait
cambridge.org
Modern Statistical Methods and Theory
Cambridge Core - Pattern Recognition and Machine Learning - Modern Statistical Methods and Theory
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Transactions on Machine Learning Research @tmlrorg.bsky.social · 22/06/2026
TMLR has been facing an significant uptick in the number of submissions since the start of 2026. This is placing an extreme burden on our amazing team of reviewers & action editors. To ease this burden, TMLR will be implementing submission quotas, effective July 1. 1/n medium.com/@TmlrOrg/ann...
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Leon Rofagha @leonrofa.bsky.social · 22/06/2026
When the ARR time series has to be put on a logarithmic scale. I still find it baffling
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Peter Thal Larsen @petertl.bsky.social · 22/06/2026
SpaceX's business model is currently less "data centers in space" and more "space in data centers" www.cnbc.com/2026/06/22/s....
SpaceX signs computing power deal with open-source AI startup Reflection worth up to $6.3 billion

SpaceX has signed a major computing power deal with Reflection AI for access to Nvidia GB300 chips at Elon Musk’s Colossus 2 data center.
The open-source AI startup will pay Musk’s company $150 million per month starting July 1, 2026, with payments totaling about $6.3 billion if the deal runs through 2029.
The deal shows how SpaceX has turned Colossus into a commercial computing power platform, landing recent deals with Anthropic, Google and Cursor.
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Leon Rofagha @leonrofa.bsky.social · 17/06/2026
🤌🤌🤌
ems.press
Estimation of discrete distributions in relative entropy, and the deviations of the missing mass | EMS Press
Jaouad Mourtada
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Gro-Tsen @gro-tsen.bsky.social · 15/06/2026
How (not) to call English place names in French. fr.wikipedia.org/wiki/Liste_d... I am now referring to the University of Oxford as «l'Université d'Osenefort», and I regret there is no «Camepont» on the list for Cambridge because that would be even better.
fr.wikipedia.org
Liste des noms français de toponymes du Royaume-Uni — Wikipédia
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Gro-Tsen @gro-tsen.bsky.social · 11/06/2026
On m'a demandé de regarder cette vidéo www.youtube.com/watch?v=AYPQ... de @monsieurphi.bsky.social sur les progrès des LLM en maths et de donner mon avis. Attention, ça va être très long!, parce que forcément j'ai beaucoup à raconter. 🧵⤵️ •1/59
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Leon Rofagha @leonrofa.bsky.social · 07/06/2026
@3blue1brown.com is doing a series on information theory!
youtube.com
Reinventing Entropy | Compression & Intelligence Part 1
YouTube video by 3Blue1Brown
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