@alpha_convert

Aspiring Abyss Domain Expert

 On The Computer
Joined April 2014
  • Tweets16.2K
  • Following2.1K
  • Followers4.3K
1.3KMedia
At the PyTorch conference today and tomorrow, come and say hi! We have lots of swag!
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sent myself a text and then got excited when my phone vibrated. 😭😪
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After 5 months, 385 citations, and 50 pages I’m excited to finally share the preprint of the survey paper my collaborators and I have been working on: 

 sainati.pl/gpu-survey-prepri… We wanted to put it on arXiv but tragically they don't take survey papers anymore.
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Joe retweeted
joomy@joomySep 23
> i ask Claude if the program is verified > he says yes > i ask if he verified the program or a smaller, better-behaved program he imagined > he laughs and says “it’s verified sir” > i use the program > it has a bug
Boris Cherny
@bchernySep 22
I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions. Video attached. TLA+ also works well. I sometimes combine Lean and TLA+ to look for issues around data flow, concurrency, and state mgmt. I don't know either language well, but Claude is excellent at both. This approach is super useful for formally modeling your code and finding bugs that a human probably wouldn't have spotted. Is formal verification the future of coding (or at least, bug finding)?
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100 problems is nothing, in programming languages we routinely solve exactly the next 700 problems
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humans, a bipedal primate notable for early contributions to matrix multiplication
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Joe retweeted
roon
@tszzlAug 30
there are some number of bad abstractions in anthropomorphizing ai intents but there are at this point more dangers from avoiding anthropomorphism at all costs. if you have a mental picture of guys living in computers, it’ll likely prepare you for the future better than otherwise
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They call it amtrak because the train am on the track
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Up first at NYC Systems, Manya Bansal on Modular GPU Programming with Typed Perspectives
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Dishonored is one of the best video games of all time. This is because it had a graphics option called “Rat Shadows on/off”
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First batch of invites out for August 20th for NYC Systems! Featuring: ​Manya Bansal of MIT on "Modular GPU Programming" and Sugu Sougoumarane of Supabase on "Multigres: Vitess for Postgres" Get on the list! luma.com/6mnm99ne

NYC Systems August 2026 · Luma

Manya Bansal of MIT on "Modular GPU Programming with Typed Perspectives" Sugu Sougoumarane of Supabase on "Multigres: Vitess for Postgres" Plus a lightning…

luma.com
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Why don’t they make the whole database out of indexes
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Caught myself briefly thinking that the goose had no value (0?) hah
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This bool could've been an enum
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At PLDI currently! So excited to share that our paper on modular gpu programming with @sainati_ @alpha_convert got a distinguished paper award (dl.acm.org/doi/10.1145/38082…)! come say hi if you're around :)

Modular GPU Programming with Typed Perspectives | Proceedings of the ACM on Programming Languages

To achieve peak performance on modern GPUs, one must balance two frames of mind: issuing instructions to individual threads to control their behavior, while simultaneously tracking the convergence of...

dl.acm.org
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I've been telling people for 25 years that Jane Street is not interested in formal methods. No more! And we're actively hiring to form a new formal methods team!
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Joe retweeted
roon
@tszzlJun 2
the frontier labs don’t have “comms problems”. reality right now has a comms problem. what is happening is a little scary and there’s no nice words anyone could say, especially not those profiting from it, that’ll make it feel that much better
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Replying to @lion_tender
What’s HPMOR?
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New blog post: On the Unreasonable Effectiveness of Property-Based Testing for Validating Formal Specifications. proofsandintuitions.net/2026… The gist: randomised testing can validate formal specs. It's very cheap and powerful: we found bugs in specs of VERINA and CLEVER benchmarks.

On the Unreasonable Effectiveness of Property-Based Testing for Validating Formal Specifications

In this post, we show that property-based testing (PBT) is surprisingly effective for validating LLM-synthesised specifications of Lean programs: it is a cheap alternative to symbolic proofs, which...

proofsandintuitions.net
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We gave @dwarkesh_sp a tour of one of our new GPU-filled data-centers. Much fun! youtube.com/watch?v=8J-GUnfS…

Dwarkesh Goes Inside Jane Street's Latest AI Data Center

Twenty years ago, our "cluster" was just 6 Dells stacked on the flo...

youtube.com
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