jle / mstksg / Lê Anh Khoa: Computational Science PhD, Physics BS, Haskeller & amateur musician; he / him

Orange, CA
Joined March 2007
To help myself make sense of all the numbers coming at us with #COVID19, I made an interactive customizable data visualizer/animator/analyzer, aggregating regional counts under customizable chains of transformations. Hope you can find it useful too! coronavirus.jle.im
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Registration for AmeriHac 2027, our North American Haskell hackathon, is now open: haskell.foundation/events/20…
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Whether your code is written by a human, clanker, monkey, potato, spatula or white noise generator The answer is still "Use pure functions statically checked with algebraic data types."
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Hi folks! I'm looking for my next tech role and would really appreciate help spreading the word. I have 10+ YoE and am open to Senior/Staff/Principal, Tech Lead, and Engineering Manager roles. An intro or RT would mean a lot. ❤️ #OpenToWork [ Rust, C#, Python, JS, AI, Infosec ]
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Justin Lê retweeted
We're delighted to finally announce the first official release of hs-bindgen, a tool that automatically generates Haskell bindings from C headers. Read the announcement at well-typed.com/blog/2026/10/… or check it out at hackage.haskell.org/package/… .
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Justin Lê retweeted
New version of my indexed-transformers Haskell library. Link in comment.
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Justin Lê retweeted
A new @HaskelInterlude episode is out, this time with @kmett! We talked about design principles for Haskell libraries, category theory, cache-oblivious algorithms and his recent work involving Haskell, C++, and FPGAs. Tune in! haskell.foundation/podcast/8…
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ghc-debug is the most underrated tool.
ghc-debug enables precise heap analysis of #Haskell programs for memory use debugging. We've been making it more usable on large programs: well-typed.com/blog/2026/10/…
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Justin Lê retweeted
THC just successfully imported Control.Lens and ran code directly from it... before it was capable of running "Hello World". My priorities may be a _little_ skewed. github.com/ekmett/thc/ #Haskell
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If you ask a random person for a random number from 1-100, you'll get a biased sample from a known distribution with entropy ~6.29 bits. a true random uniform sample is ~6.64 bits so, if you asked 1000 random people, you actually can generate 946 truly uniform samples from 1-100
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thinking about this it is less profound than I thought because you are already importing entropy to select your 1000 random people....
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Justin Lê retweeted
Happy birthday Pandoc! Pandoc is amazing, and so is its story. I've used Pandoc over 15 years myself, including working on a 700-page CS textbook, my entire website and countless individual documents. I still love it. pandoc.org/twenty-years-of-p…
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Wrote a blog post about my adventures writing #Haskell with agentic coding assistants and LLM. Focusing on one aspect: different constraint-evading behaviors I have noticed, and how to spot them
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big and true
Yeah Fable is cool but just today I proved many previously unknown results that would be major math news if not for the Fable thing overshadowing it For example: 1. The Jacobian conjecture implies the Reimann hypothesis 2. The Jacobian conjecture implies P=NP 3. The Jacobian conjecture implies that, for all integers N, repeatedly applying the map 3N+1 when N is odd and N/2 when even eventually results in 4-2-1 loop 4. The Jacobian conjecture implies that pi^pi^pi^pi^pi is an integer
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Justin Lê retweeted
hello there the jacobian conjecture is false thanx to my close friend akhil for asking about it and my other close friend fable for working during the world cup final ((1+xy)^3 z + y^2 (1+xy) (4+3xy), y + 3 x (1+xy)^2 z + 3 x y^2 (4+3xy), 2 x - 3 x^2 y - x^3 z): \C^3\to \C^3, has jacobian determinant -2, and sends (0, 0, -1/4), (1, -3/2, 13/2), and (-1, 3/2, 13/2) to (-1/4, 0, 0)
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all this effort just to misspell spider-man
absolutely losing it at this
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Justin Lê retweeted
“[long explanation]. Thus my previous response was incorrect.”
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New Blog Post: Extreme Haskell with Typed Expression EDSLs #haskell
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Bonus reflection on Haskell and agentic LLM coding at the end blog.jle.im/entry/extreme-ha…
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