This is Reservoir, the registry for all Lean packages and documentation.

Reservoir indexes, builds, and tests packages within the Lean and Lake ecosystem. If you wish to see your package here, ensure that it meets the Reservoir inclusion criteria.

Most Popular

  1. Commit 83b9f16 builds on the recent leanprover/lean4:v4.35.0-rc1
    mathlib
    The math library of Lean 4
  2. Commit f9e8bc5 builds on the recent leanprover/lean4:v4.34.0-rc2
    NavierStokesAndEuler
    Lean certificates accompanying Navier-Stokes and Euler results
  3. Commit 245b2e1 builds on the old leanprover/lean4:v4.29.0-rc8
    Analysis
    A Lean companion to Analysis I
  4. Commit 4c0618b fails to build on leanprover/lean4:v4.34.0
    ryu
    Converts floating point numbers to decimal strings
  5. Commit 84e433e builds on the recent leanprover/lean4:v4.34.0
    LeanCopilot
    LLMs as Copilots for Theorem Proving in Lean
  6. Commit 24984cb builds on the recent leanprover/lean4:v4.33.1
    formal_conjectures
    A collection of formalized statements of conjectures in Lean.
  7. Commit bb71146 builds on the recent leanprover/lean4:v4.34.0-rc2
    FLT
    Ongoing Lean formalisation of the proof of Fermat's Last Theorem
  8. Commit 891d597 builds on the old leanprover/lean4:v4.33.0
    Physlib
    A project to digitalise results from physics into Lean.
  9. Commit 41094e5 builds on the recent leanprover/lean4:v4.35.0-rc2
    cslib
    The Lean Computer Science Library (CSLib)
  10. Commit dd6d752 builds on the old leanprover/lean4:v4.30.0
    mil
    The user home repository for the Mathematics in Lean tutorial.

Newly Created

  1. Commit f9e8bc5 builds on the recent leanprover/lean4:v4.34.0-rc2
    NavierStokesAndEuler
    Lean certificates accompanying Navier-Stokes and Euler results
  2. Commit a26427e builds on the old leanprover/lean4:v4.32.0-rc1
    kakeya
  3. Commit 9ecf082 builds on the old leanprover/lean4:v4.30.0
    pcfAlephOmega4
    A Lean 4 formalization of the PCF bound 2^aleph_omega < aleph_(omega_4) under the strong-limit hypothesis.
  4. Commit 09b97db builds on the old leanprover/lean4:v4.33.0-rc1
    goldbach
    A Lean 4 formalization of Chen's theorem (Goldbach 1+2).
  5. Commit c02708a builds on the old leanprover/lean4:v4.28.0
    Erdos548
    Lean 4 Erdős problem #548 (Erdős–Sós conjecture): proof, found by GPT-6 Astra in the FrontierMath Erdős benchmark
  6. Commit ed6ab14 builds on the recent leanprover/lean4:v4.34.0-rc2
    dLean
  7. Commit 0296972 fails to build on leanprover/lean4:v4.34.0-rc2
    LocalComplexGeometry
    Foundational theorems in local complex-analytic geometry formalized in Lean 4
  8. Commit 6ac1d73 builds on the old leanprover/lean4:v4.33.0
    eggshell
    Local memory for Codex. Reuse work across chats without LLM calls to organize it.
  9. Commit 38f5a43 builds on the old leanprover/lean4:v4.33.0
    langlib
    Esoteric Programming Languages, Formally
  10. Commit 4e79656 builds on the old leanprover/lean4:v4.33.0
    FsFormal
    Palomar-ready Lean formalization of an improved Furstenberg-Sarkozy lower bound

Recently Updated

  1. Commit 9779958 fails to build on leanprover/lean4:v4.33.1
    GroupApproximation
  2. Commit cad9de3 builds on the recent leanprover/lean4:v4.34.0-rc2
    TauCeti
    An AIs-welcome Lean library downstream of Mathlib: AI handle the implementation and review, humans write the roadmaps and review rubrics
  3. Commit 4e1d20f builds on the recent leanprover/lean4:v4.34.0-rc1
    InfinityCosmos
    A blueprint for a formalization of infinity-cosmos theory in Lean.
  4. Commit e636fae builds on the recent leanprover/lean4:v4.34.0
    linglib
    A Lean 4 library for formal linguistics: semantics, syntax, pragmatics, morphology, phonology, and processing — formalized across competing frameworks for high interconnection density.
  5. Commit 24984cb builds on the recent leanprover/lean4:v4.33.1
    formal_conjectures
    A collection of formalized statements of conjectures in Lean.
  6. Commit bea16dc builds on the recent leanprover/lean4:v4.34.0
    VCVio
    Machine-checked cryptographic proofs in Lean, built on Mathlib: oracle computations, probability semantics, program logic, and lattice- and hash-based schemes.
  7. Commit 71f031e builds on the recent leanprover/lean4:v4.34.0
    SFL
    Development repo for translating Software Foundations to Lean
  8. Commit 34e0fb3 builds on the old leanprover/lean4:v4.33.0
    Apportionmentlib
    Formal verification of apportionment theory.
  9. Commit 583c61c builds on the old leanprover/lean4:v4.30.0-rc2
    btc-verified
    Verified Bitcoin protocol components in Lean 4 — serialization, txids, and merkle commitments checked against real mainnet blocks.
  10. Commit 3746b7b builds on the old leanprover/lean4:v4.25.0
    tCSlib
    Lean 4 Theoretical Computer Science Library