#mathlib
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adler.dev
the mathlib experience
aviva.gay 🦌≈ @aviva.gay · Mar 9
recompiling bc it’s cold
March 9, 2026 at 8:09 PM
davy.quest
formal - a property checker for code, backed by Lean 4 and Mathlib. Your agent writes the properties and the proofs; formal checks them.

github.com/yamafaktory/...

#lean #mathlib #rust #dev #llm #code
GitHub - yamafaktory/formal: A Lean 4 + Mathlib proof service for the agent working on your code
A Lean 4 + Mathlib proof service for the agent working on your code - yamafaktory/formal
github.com
September 24, 2026 at 2:51 PM
jalonso.eurosky.social
The Mathlib initiative (Building the digital foundation of mathematics). mathlib-initiative.org #ITP #LeanProver #Mathlib #Math
The Mathlib Initiative
The Mathlib Initiative supports the development of mathematical libraries in the Lean theorem prover.
mathlib-initiative.org
October 3, 2025 at 5:23 PM
yuxi.ml
meanwhile, the mathlib community is having a crisis
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leanprover.zulipchat.com#narrow/chann...
March 23, 2026 at 8:16 PM
adler.dev
holy shit what are the mathlib devs doing
June 7, 2026 at 1:48 PM
lathrys.at
there’s going to be breakthroughs that get announced not as preprints or tweets but rather PRs to the mathlib repo
July 23, 2026 at 3:40 PM
leastinformednerd.bsky.social
😔
error: ././.lake/packages/mathlib/lakefile.lean:29:40: error: unexpected token ']'; expected term error: ././.lake/packages/mathlib/lakefile.lean: package configuration has errors
August 20, 2025 at 6:07 AM
davidcrespo.bsky.social
lol at what it takes to build the 13M-line Lean proof of Fermat's Last Theorem
github.com/anthropics/f...
Check it yourself You need Linux or macOS (some paths are too long for Windows), elan (it installs Lean 4.33.1 from lean-toolchain), and a network connection: Lake fetches Mathlib from GitHub and compiles it from source, since no prebuilt Mathlib matches this toolchain (about 13 minutes at 96 jobs). The build needs about 5 GB of memory per parallel job (a few modules need up to 36 GB); about 67 GB of disk under .lake/, plus C files (about 220 GB) that can be deleted as the build goes. Ours took 5 h 32 min at 96 jobs, with a peak of 153 GB of memory. comparator takes about 15 hours (ours: 14 h 46 min), nearly all of it the kernel replay on one core. Our peak memory was 230 GB, so allow 300 GB. Run nanoda after the comparator script, whose tools it reuses. Writing the 37.8 GB export takes about 90 GB of memory for an hour, and the check itself about 40 GB (about 30 minutes at 16 threads). Both scripts are for Linux (bash, git, python3, GNU coreutils; nanoda also needs patch, cargo and crates.io).
September 4, 2026 at 8:06 PM
rdhawkins.bsky.social
Unreasonably happy about making a small contribution to mathlib, one of the most exciting intellectual projects of our time.
May 20, 2026 at 3:23 PM
lean-lang.org
🎉 Technical Debt Win: 3,000+ Mathlib papercuts eliminated!
Last quarter we reduced porting notes from ~5,000 to 1,750. Most impressive? 95% required minimal effort, showing how Lean improvements are paying off!

#LeanProver #LeanLang #Mathlib
April 15, 2025 at 10:31 PM
niss.yummy.cricket
haha 1 like 1 fact [copies a random thing from mathlib for every like]
July 24, 2025 at 12:18 AM
danabra.mov
very interesting! thanks for sharing. i think the author underestimates llm ability to do canonization. mathlib vs mathslop feels like false dichotomy to me
July 11, 2026 at 1:10 AM
socmathfrance.bsky.social
Le prix Demailly 2026, pour la sciences ouverte en mathématiques, est attribué au projet

Mathlib
leanprover-community.github.io/mathlib-over...

Félicitations !

Un prix SMF, SMAI, SFdS et EPIGA
Plus d'infos : epiga.episciences.org/page/session...
May 26, 2026 at 11:46 AM
jalonso.eurosky.social
Growing Mathlib: Maintenance of a large scale mathematical library. ~ Anne Baanen, Matthew Robert Ballard, Johan Commelin, Bryan Gin-ge Chen, Michael Rothgang, Damiano Testa. arxiv.org/abs/2508.21593 #ITP #LeanProver #Mathlib #Math
Growing Mathlib: maintenance of a large scale mathematical library
The Lean mathematical library Mathlib is one of the fastest-growing libraries of formalised mathematics. We describe various strategies to manage this growth, while allowing for change and avoiding ma...
arxiv.org
October 8, 2025 at 10:24 AM
ilyasergey.bsky.social
A two-weekend fun project from 2 months ago: Vermilion, an experimental Lean 4 backend for Verus verifier for Rust. Verification conditions are readable Lean theorems, provable with an SMT solver, Lean's grind, Mathlib lemmas, by hand, or by your favorite AI system.

github.com/ilyasergey/v...
September 24, 2026 at 3:49 AM
lean-lang.org
Mathlib is a community-built library of mathematics in Lean with nearly 1.8MM lines of code and 190K mathematical theorems! Over 500 contributors have helped drive Mathlib forward at an incredible pace! Learn more at: leanprover-community.github.io/index.html

#leanlang #leanprover #community
February 27, 2025 at 9:14 PM
iame.li
i love that `Mathlib/Deprecated` is a path there. "technically this math is still supported but we may retire it in the future, please migrate away in your proofs"
September 6, 2026 at 12:42 AM
lean-lang.org
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
February 22, 2026 at 5:32 PM
xenaproject.bsky.social
A new "Mathlib initiative" focussed around Lean's mathematics library has been announced. Thanks to the generosity of Alex Gerko and XTX Markets, there is finally an official entity focussed on growing this 21st century way of doing mathematics.

www.renaissancephilanthropy.org/news-and-ins...
Lean FRO and Mathlib receive $10M from XTX Markets Founder Alex Gerko to further advance the use of AI for mathematical research — Renaissance Philanthropy – A brighter future for all through science,...
FOR IMMEDIATE RELEASE July 24, 2025 Contact: media@renphil.org ; richard.hillary@xtxmarkets.com ; pr@convergentresearch.org
www.renaissancephilanthropy.org
July 24, 2025 at 6:33 PM
jalonso.eurosky.social
Searching for theorems in Mathlib. ~ Bolton Bailey. leanprover-community.github.io/blog/posts/s... #ITP #LeanProver #Math
Searching for Theorems in Mathlib
A post for beginners on the different ways to search for theorems in mathlib, inspired by this talk from Jireh Loreaux. Mathlib has a lot of theorems, and it can be hard to find the one you're looki
leanprover-community.github.io
June 26, 2025 at 10:50 AM
johncarlosbaez.bsky.social
What's the easiest way to hack Lean, Mathlib or some other software so that when someone checks your formalized proof of a Millennium Prize problem, it comes out saying "yup, the proof is good"?

Asking for a friend.
September 10, 2026 at 9:53 AM
adolfoneto.elixiremfoco.com
The Mathlib Initiative website is live!
#LeanLang
mathlib-initiative.org
The Mathlib Initiative
The Mathlib Initiative supports the development of mathematical libraries in the Lean theorem prover.
mathlib-initiative.org
October 3, 2025 at 6:01 PM
danabra.mov
now the question (pending further verification) is what to do with the result. in mathematics when you publish, you take responsibility for what is written. the only thing i can truly take responsibility for is the Lean *proposition* because i intentionally expressed it using Mathlib only.
August 23, 2026 at 8:03 PM
yetanotheruseless.com
Have you ever thought that perhaps mathematics was just not *arcane* enough?

That all your theorems weirdness was just lost when shown to non-math people?

Well have I (and Opus 5.5 and Astra) got the thing for you:

blog.yetanotheruseless.com/Arcana/

(open source: github.com/jakemannix/A... )
Arcana · Enchantment
Enchantment: a checked mathlib grimoire of group theory, with shared cantrips and foldable Arcana spells.
blog.yetanotheruseless.com
September 23, 2026 at 10:42 PM
teorth.bsky.social
*AI for Mathematics and Theoretical Computer Science*, a workshop hosted jointly by the Simons Institute for the Theory of Computing and the Simons Laufer Mathematical Sciences Institute, will be held in Berkeley at April 7-11, 2025.

simons.berkeley.edu/workshops/si...
Simons Institute for the Theory of Computing and SLMath Joint Workshop: AI for Mathematics and Theoretical Computer Science
This is an exciting time for mathematics, as new technologies for mathematical reasoning provide novel opportunities for mathematical research, communication, and discovery. Mathlib, a library of form...
simons.berkeley.edu
December 2, 2024 at 10:08 PM