A Lean proof of Fermat’s Last Theorem
Kevin Buzzard, Richard Taylor
May 18, 2025
bit.ly/43qH832
#LeanLang
#LeanProver
Kevin Buzzard, Richard Taylor
May 18, 2025
bit.ly/43qH832
#LeanLang
#LeanProver
May 18, 2025 at 6:30 PM
A Lean proof of Fermat’s Last Theorem
Kevin Buzzard, Richard Taylor
May 18, 2025
bit.ly/43qH832
#LeanLang
#LeanProver
Kevin Buzzard, Richard Taylor
May 18, 2025
bit.ly/43qH832
#LeanLang
#LeanProver
Lynx
An experimental Erlang/Elixir-to-Lean translation and verification project.
#Leanlang #ElixirLang
github.com/josevalim/ly...
An experimental Erlang/Elixir-to-Lean translation and verification project.
#Leanlang #ElixirLang
github.com/josevalim/ly...
GitHub - josevalim/lynx: Proofs for Erlang/Elixir programs through LEAN (via automatic translation of Core Erlang)
Proofs for Erlang/Elixir programs through LEAN (via automatic translation of Core Erlang) - josevalim/lynx
github.com
September 23, 2026 at 3:15 PM
Lynx
An experimental Erlang/Elixir-to-Lean translation and verification project.
#Leanlang #ElixirLang
github.com/josevalim/ly...
An experimental Erlang/Elixir-to-Lean translation and verification project.
#Leanlang #ElixirLang
github.com/josevalim/ly...
Incredibly grateful to @sigplan.bsky.social and @sigplan-pldi.bsky.social for awarding #LeanLang the Programming Languages Software Award 2025 at #PLDI2025!
#LeanProver #FormalMethods #ProgrammingLanguages #Mathematics #SoftwareVerification
#LeanProver #FormalMethods #ProgrammingLanguages #Mathematics #SoftwareVerification
June 20, 2025 at 4:04 AM
Incredibly grateful to @sigplan.bsky.social and @sigplan-pldi.bsky.social for awarding #LeanLang the Programming Languages Software Award 2025 at #PLDI2025!
#LeanProver #FormalMethods #ProgrammingLanguages #Mathematics #SoftwareVerification
#LeanProver #FormalMethods #ProgrammingLanguages #Mathematics #SoftwareVerification
How Terry Tao Became an Evangelist for Improv Comedy Groups in Math
#LeanLang #LeanProver
cc @anthonymoser.com
#LeanLang #LeanProver
cc @anthonymoser.com
How Terry Tao became an evangelist for AI in math. ~ Kevin Hartnett. www.quantamagazine.org/how-terry-ta... #AI4Math #LeanProver #ITP
June 10, 2026 at 12:33 PM
How Terry Tao Became an Evangelist for Improv Comedy Groups in Math
#LeanLang #LeanProver
cc @anthonymoser.com
#LeanLang #LeanProver
cc @anthonymoser.com
cbsoft.sbc.org.br
September 24, 2026 at 6:07 PM
xcancel.com
January 2, 2026 at 9:38 AM
The author of Property-Baeed Testing for the People, Harry Goldstein, gave a talk entitled "The Best New Programming Language is a Proof Assistant"
youtu.be/c5LOYzZx-0c
youtu.be/c5LOYzZx-0c
The Best New Programming Language is a Proof Assistant by Harry Goldstein | DC Systems 006
YouTube video by Antithesis
youtu.be
July 4, 2025 at 2:18 PM
Excited to see #LeanLang in the new @stanforduniversity.bsky.social course CS99: 𝘍𝘶𝘯𝘤𝘵𝘪𝘰𝘯𝘢𝘭 𝘗𝘳𝘰𝘨𝘳𝘢𝘮𝘮𝘪𝘯𝘨 𝘢𝘯𝘥 𝘛𝘩𝘦𝘰𝘳𝘦𝘮 𝘗𝘳𝘰𝘷𝘪𝘯𝘨 𝘪𝘯 𝘓𝘦𝘢𝘯 4, by @aniva.bsky.social, Abdalrhman Mohamed and sponsored by Clark Barrett, including fantastic slides and #LeanLang code!
See the course: web.stanford.edu/class/cs99
See the course: web.stanford.edu/class/cs99
web.stanford.edu
May 28, 2025 at 11:44 PM
Excited to see #LeanLang in the new @stanforduniversity.bsky.social course CS99: 𝘍𝘶𝘯𝘤𝘵𝘪𝘰𝘯𝘢𝘭 𝘗𝘳𝘰𝘨𝘳𝘢𝘮𝘮𝘪𝘯𝘨 𝘢𝘯𝘥 𝘛𝘩𝘦𝘰𝘳𝘦𝘮 𝘗𝘳𝘰𝘷𝘪𝘯𝘨 𝘪𝘯 𝘓𝘦𝘢𝘯 4, by @aniva.bsky.social, Abdalrhman Mohamed and sponsored by Clark Barrett, including fantastic slides and #LeanLang code!
See the course: web.stanford.edu/class/cs99
See the course: web.stanford.edu/class/cs99
Advent of Code starts tomorrow.
You can do it with Lean.
There is a book to help you with that.
#LeanLang
lean-lang.org/functional_p...
You can do it with Lean.
There is a book to help you with that.
#LeanLang
lean-lang.org/functional_p...
Functional Programming in Lean - Functional Programming in Lean
lean-lang.org
November 30, 2024 at 6:46 PM
Advent of Code starts tomorrow.
You can do it with Lean.
There is a book to help you with that.
#LeanLang
lean-lang.org/functional_p...
You can do it with Lean.
There is a book to help you with that.
#LeanLang
lean-lang.org/functional_p...
Rust + Formal Verification 😍
Also Aeneas sounds so cool: translates Rust's IR to Coq, Lean4, and F*
Also Aeneas sounds so cool: translates Rust's IR to Coq, Lean4, and F*
Verify the Safety of the Rust Standard Library
aws.amazon.com/pt/blogs/ope...
aws.amazon.com/pt/blogs/ope...
December 3, 2024 at 12:24 PM
#LeanLang #LeanProver
Lean is an open-source functional programming language and interactive theorem prover
Lean is an open-source functional programming language and interactive theorem prover
December 14, 2024 at 1:08 PM
#LeanLang #LeanProver
Lean is an open-source functional programming language and interactive theorem prover
Lean is an open-source functional programming language and interactive theorem prover
CSLib
A Focused Effort on Formalizing Computer Science in Lean
www.cslib.io
January 21, 2026 at 4:28 PM
📣 We're excited to share the new lean-lang.org!
Relaunching our website was a key deliverable in our Year 2 roadmap to provide "improved navigation and access to valuable content, resources, and tools." We hope you like it!
#LeanLang #LeanProver
Relaunching our website was a key deliverable in our Year 2 roadmap to provide "improved navigation and access to valuable content, resources, and tools." We hope you like it!
#LeanLang #LeanProver
July 7, 2025 at 9:02 PM
📣 We're excited to share the new lean-lang.org!
Relaunching our website was a key deliverable in our Year 2 roadmap to provide "improved navigation and access to valuable content, resources, and tools." We hope you like it!
#LeanLang #LeanProver
Relaunching our website was a key deliverable in our Year 2 roadmap to provide "improved navigation and access to valuable content, resources, and tools." We hope you like it!
#LeanLang #LeanProver
April 22, 2025 at 4:54 PM
🎉 Lean 4.22.0 is here! It represents the culmination of our Year 2 roadmap! Including:
🧠 New grind tactic (SMT-style automated reasoning)
🏗️ New compiler (major performance foundation)
Read the release notes: lean-lang.org/doc/reference/latest/releases/v4.22.0/
#LeanLang #LeanProver
🧠 New grind tactic (SMT-style automated reasoning)
🏗️ New compiler (major performance foundation)
Read the release notes: lean-lang.org/doc/reference/latest/releases/v4.22.0/
#LeanLang #LeanProver
August 15, 2025 at 7:40 PM
🎉 Lean 4.22.0 is here! It represents the culmination of our Year 2 roadmap! Including:
🧠 New grind tactic (SMT-style automated reasoning)
🏗️ New compiler (major performance foundation)
Read the release notes: lean-lang.org/doc/reference/latest/releases/v4.22.0/
#LeanLang #LeanProver
🧠 New grind tactic (SMT-style automated reasoning)
🏗️ New compiler (major performance foundation)
Read the release notes: lean-lang.org/doc/reference/latest/releases/v4.22.0/
#LeanLang #LeanProver
Boris Cherny "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."
His evidence: "Video attached." on X
#LeanLang
His evidence: "Video attached." on X
#LeanLang
September 23, 2026 at 4:06 PM
Boris Cherny "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."
His evidence: "Video attached." on X
#LeanLang
His evidence: "Video attached." on X
#LeanLang
Will #LeanLang #LeanProver kill all other programming languages?
@lean-lang.org really lives up to its namesake as a gateway drug! :)
unexpected side effect of learning Lean is that i can sort of read ML and Haskell syntax a bit better even though something is still turning me off
August 9, 2025 at 12:34 PM
Will #LeanLang #LeanProver kill all other programming languages?
Really nice intro (no pun intended) to Lean syntax + some simple examples of writing proofs about your code 👌
#LeanLang
#LeanLang
⚛️📝 New on Overreacted: Lean for JavaScript Developers
Lean for JavaScript Developers — overreacted
Programming with proofs.
overreacted.io
September 3, 2025 at 6:35 AM
Really nice intro (no pun intended) to Lean syntax + some simple examples of writing proofs about your code 👌
#LeanLang
#LeanLang
CSLib just launched — an open-source effort to formalize computer science in Lean, inspired by Mathlib. CS researchers, practitioners & enthusiasts are invited to get involved!
Learn more at:
🌐 cslib.io
🤝 Contribute: github.com/leanprover/c...
#LeanLang #LeanProver #CSLib #FormalVerification
Learn more at:
🌐 cslib.io
🤝 Contribute: github.com/leanprover/c...
#LeanLang #LeanProver #CSLib #FormalVerification
February 22, 2026 at 5:32 PM
CSLib just launched — an open-source effort to formalize computer science in Lean, inspired by Mathlib. CS researchers, practitioners & enthusiasts are invited to get involved!
Learn more at:
🌐 cslib.io
🤝 Contribute: github.com/leanprover/c...
#LeanLang #LeanProver #CSLib #FormalVerification
Learn more at:
🌐 cslib.io
🤝 Contribute: github.com/leanprover/c...
#LeanLang #LeanProver #CSLib #FormalVerification
Really enjoyed this talk by @harrisongoldste.in that demonstrates inventive uses of the #LeanLang InfoView enhanced by metaprogramming techniques to display real-time testing data.
#LeanProver #Metaprogramming #VSCode #PropertyTesting
#LeanProver #Metaprogramming #VSCode #PropertyTesting
June 30, 2025 at 9:14 PM
Really enjoyed this talk by @harrisongoldste.in that demonstrates inventive uses of the #LeanLang InfoView enhanced by metaprogramming techniques to display real-time testing data.
#LeanProver #Metaprogramming #VSCode #PropertyTesting
#LeanProver #Metaprogramming #VSCode #PropertyTesting
We're excited to join Bluesky! The Lean FRO develops Lean, an interactive theorem prover and functional programming language advancing mathematics, formal verification, and AI. Follow us for updates on our roadmap and community. #leanlang #leanprover #mathematics #formalverification #ai
February 26, 2025 at 10:04 PM
We're excited to join Bluesky! The Lean FRO develops Lean, an interactive theorem prover and functional programming language advancing mathematics, formal verification, and AI. Follow us for updates on our roadmap and community. #leanlang #leanprover #mathematics #formalverification #ai
I saw it today during a meeting with an undergraduate student who is studying Lean.
Beautiful!
#LeanLang #LeanProver
Beautiful!
#LeanLang #LeanProver
📣 We're excited to share the new lean-lang.org!
Relaunching our website was a key deliverable in our Year 2 roadmap to provide "improved navigation and access to valuable content, resources, and tools." We hope you like it!
#LeanLang #LeanProver
Relaunching our website was a key deliverable in our Year 2 roadmap to provide "improved navigation and access to valuable content, resources, and tools." We hope you like it!
#LeanLang #LeanProver
July 7, 2025 at 11:05 PM
I saw it today during a meeting with an undergraduate student who is studying Lean.
Beautiful!
#LeanLang #LeanProver
Beautiful!
#LeanLang #LeanProver
🎉 Lean 4.23.0 is here! Includes many usability improvements, including:
🎯 Enhanced 'Go to Definition' supporting type class instances
🔧 Interactive error hints for faster debugging
Release notes: lean-lang.org/doc/referenc...
#LeanLang #LeanProver #OpenSource #Mathematics #FormalVerification
🎯 Enhanced 'Go to Definition' supporting type class instances
🔧 Interactive error hints for faster debugging
Release notes: lean-lang.org/doc/referenc...
#LeanLang #LeanProver #OpenSource #Mathematics #FormalVerification
September 16, 2025 at 6:46 PM
🎉 Lean 4.23.0 is here! Includes many usability improvements, including:
🎯 Enhanced 'Go to Definition' supporting type class instances
🔧 Interactive error hints for faster debugging
Release notes: lean-lang.org/doc/referenc...
#LeanLang #LeanProver #OpenSource #Mathematics #FormalVerification
🎯 Enhanced 'Go to Definition' supporting type class instances
🔧 Interactive error hints for faster debugging
Release notes: lean-lang.org/doc/referenc...
#LeanLang #LeanProver #OpenSource #Mathematics #FormalVerification