A star delta has been computed for 61,707 of 62,640 tracked repositories in this period, and only those can be ranked in it.
A repository missing here has not been measured far enough back yet. That does not mean it did not move.
Star counts measured between 00:32 and 04:33 (BKK).
Lean 4 programming language and theorem prover
The math library of Lean 4
An AIs-welcome Lean library downstream of Mathlib: AI handle the implementation and review, humans write the roadmaps and review rubrics
Lean documentation authoring tool
A collection of formalized statements of conjectures in Lean.
The Lean Computer Science Library (CSLib)
A project to digitalise results from physics into Lean.
A 128-bit universal hash function designed for fast file/data stream integrity checks with cryptographic strength, written in Rust.
Benchmarking coding agents on formalized undergraduate research problems
Lean verified proof that every positive even integer greater than 2 is the sum of two positive integers with Liouville value -1.
Lean certificates accompanying Navier-Stokes and Euler results
C-HD: Lean 4 proof package for a directed single-source shortest-path bound (snapshot 2026-09-20)
Formally Verified Arguments of Knowledge in Lean
Lean 4 framework for reasoning about Triton-style kernels.
Michael Spivak's Calculus formalized in Lean 4: every theorem and every problem of all 30 chapters and 9 appendices, in both the 3rd and 4th editions
Lean formalization work extending the matrix multiplication 9/4 argument to arbitrary fields
Concrete is a simple programming language specifically crafted for creating highly scalable systems that are reliable, efficient, and easy to maintain.
Some Cryptids and Lean proofs
LeanCIL is a Lean 4 formal verification framework for .NET programs. It enables machine-checked proofs of correctness and safety against compiled Common Intermediate Language (CIL), supporting applications written in C#, F#, and other .NET languages.
That's all 22 repositories in this period.
