@OptimistsInc

Assistant Prof @ Johns Hopkins CS. Interested in theory of ML, secure computation. All cat pictures are my own and do not represent the cats of my employer.

jlsorrell.github.io/
Joined March 2024
  • Tweets453
  • Following1K
  • Followers1.4K
54Media
Weird how they’ve found so many amazing things and yet not one single result related to practical cryptanalysis. I guess everyone should pat themselves on the back for a job well done.
Dan Roberts
@danintheoryOct 26
We are announcing three new discoveries in mathematics, computer science, and physics about harmonic analysis, complexity theory, and quantum field theory. openai.com/index/building-sc…

Working with academic communities to build scientific understanding

OpenAI shares model results on the Kakeya conjecture, Exponential Time Hypothesis, and quantum chromodynamics—and how researchers can verify and build on them.

openai.com
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Haha what
Ryan Williams @rrwilliams.bsky.social@rrwilliamsOct 26
An internal model at OpenAI has produced a claimed refutation of ETH! Russell Impagliazzo, Mohan Paturi, and I have been asked to help organize an open and independent examination of this claim. 1/4
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I am respectfully requesting that all TCS tokens be redirected to ruling out Pessiland please and thank you
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Jess Sorrell retweeted
Seth Lazar
@sethlazarOct 21
And if you choose the DC option you’d have a great local community at @JHUBloombergCtr
Ryan Kidd
@ryan_kidd44Oct 20
MATS Residency applications close Oct 31! If you're a brilliant computer scientist, physicist, mathematician, governance expert, neuroscientist, lawyer, economist, etc. who wants to work on AI safety & security, we'll empower you to do that work full time. Apply: matsprogram.org/residency?ut…

MATS Residency

MATS research spans AI alignment, safety, interpretability, governance, and model behavior, bringing together diverse approaches to understanding and steering advanced AI systems.

matsprogram.org
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How should two agents collaborate if they hold different information? We are 95% certain they should communicate their uncertainty. 🚨In our new NeurIPS paper we show that communicating calibrated probabilities can benefit collaborative decision-making! arxiv.org/abs/2610.19215
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How do you even generate an RSA key with d=4, I ask, not wanting to be told the answer.
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Yes! More of this, please! Distilling new results to their simplest (and most presentable) formulation is a massive service to the research community and should be valued accordingly. Shachar and Sankeerth (@sankeerth1729) are doing fantastic work.
Gautam Kamath@thegautamkamathOct 16
I want to highlight 2 theorists who have distinguished themselves as true scholars: Sankeerth Rao Karingula (@sankeerth1729) & Shachar Lovett They have done exceptional work in simplifying and expositing recent breakthroughs on Komlos, 3SUM, etc. They have my highest respect.
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Over 400 academics in 30+ countries signed our open letter calling for immediate changes in AI development and deployment practices to ensure that cybersecurity incidents do not continue to occur, as future incidents will be far more damaging to our critical infrastructure.
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Yoshua Bengio
@Yoshua_BengioOct 13
Over 400 researchers and I have signed this open letter calling for the AI and security communities to come together to improve alignment and containment approaches in order to protect our critical infrastructure and digital systems. ai-security-letter.org/
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This would buy an awful lot of goodwill with the theorists, just saying
Samuel Hammond 🦉
@hamandcheeseOct 8
Please pretty please rule out Pessiland, o AI gods 🙏 Asking for a friend.
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I think we might actually need more mathematicians
Andrew Curran
@AndrewCurran_Oct 6
OpenAI's Math post is up! github.com/openai/math

GitHub - openai/math

Contribute to openai/math development by creating an account on GitHub.

github.com
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Pardon me for being sentimental, but I'm actually in tears over this
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Come work with us @JHUCompSci! We're hiring tenure-track faculty in all areas, with a particular focus on - AI systems - AI safety and security - AI reasoning and alignment - AI ethics, policy, and governance apply.interfolio.com/194231 (DMs are open if you have any questions)
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The what now?! arxiv.org/abs/2610.06783v1

Truly Subquadratic 3SUM and Truly Subcubic APSP via Triangles in...

We give the first polynomial improvements over the textbook algorithms for $3$SUM and All-Pairs Shortest Paths (APSP): we show how to deterministically solve $3$SUM on $n$ integers of polynomial...

arxiv.org
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David Savitt@dsavittSep 28
Hello, world! There is a new repository for works in math and TCS: hexagonmath.org, now in public beta. Please try it out and submit something! We welcome your feedback while we build and improve it.

Hexagon

A repository for research-level works in the mathematical sciences and theoretical computer science.

hexagonmath.org
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Anthony Leverrier@letonyoSep 21
you read the abstract and immediately think: there is a typo in there. What is this 36 doing here?
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Love to see the @JohnsHopkins SGP representation at Takeoff!
Sparrow Infrastructure
@sparrowinfraSep 15
Joining Takeoff: @Dominic2306, @AGamick, @nickacaputo, and @daniel_bring. Meet the researchers, builders, and policymakers shaping how we govern in the age of AI. November 13–15 · Washington, D.C. Apply at takeoffdc.com
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Nick Caputo
@nickacaputoSep 15
We're hiring faculty at SGP! The need for excellent and independent AI governance is only getting clearer, and we're building the academic institution to provide it. SGP understands the urgency of this moment and that universities need to transform themselves to meet it. Working with the brilliant @ghadfield and @sethlazar on this project has been a privilege, and the whole School understands the need for reinventing government and education for public service. And being in DC puts us right in the mix. Come join! We're hiring for Frontier AI directly, but also in political philosophy, organizations, regulation, and other fields that we need to bring to bear on AI governance. Links to Assistant and Associate/Full Professor postings below.
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Which do you think is more likely? (I genuinely don't have an opinion)
79%Lean FLT and NS correct
21%Bug in the Lean kernel
620 votes • Final results
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Introducing Takeoff, a first-of-its-kind conference on governing ourselves in the age of artificial intelligence. We’re bringing together a small group of public servants, AI researchers, and other leading voices in Washington, D.C., November 13–15, 2026.
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