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 282fbb8 builds on the recent leanprover/lean4:v4.35.0-rc3
    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 2c165a0 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:v4.35.0-rc3
    ryu
    Converts floating point numbers to decimal strings
  5. Commit a303359 builds on the recent leanprover/lean4:v4.34.1
    LeanCopilot
    LLMs as Copilots for Theorem Proving in Lean
  6. Commit df3f12d builds on the recent leanprover/lean4:v4.33.1
    formal_conjectures
    A collection of formalized statements of conjectures in Lean.
  7. Commit f6c6a2f builds on the recent leanprover/lean4:v4.35.0-rc3
    FLT
    Ongoing Lean formalisation of the proof of Fermat's Last Theorem
  8. Commit da58032 builds on the recent leanprover/lean4:v4.34.1
    Physlib
    A project to digitalise results from physics into Lean.
  9. Commit 8c41993 builds on the recent leanprover/lean4:v4.35.0-rc3
    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 c24e9fc builds on the recent leanprover/lean4:v4.34.0-rc2
    SpivakCalculus
    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
  2. Commit 4d55691 builds on the recent leanprover/lean4:v4.35.0-rc1
    MovingSofa
    Autoformalization of Baek's solution to the moving sofa problem: the Gerver sofa is optimal
  3. Commit 035e9b0 fails to build on leanprover/lean4:v4.34.0
    nsLean
    Lean 4 proof that Naslund's Conjecture 13 fails at q = 3: square-difference-free subsets of F_3[T] past 3^(3n/4)
  4. Commit c0a7d9f fails to build on leanprover/lean4:v4.34.0
    xRayLean
    Lean proofs of constructive binary X-ray families, counting bounds, and an extension theorem
  5. Commit 7b5d69c fails to build on leanprover/lean4:v4.34.1
    JoltBytecode
    Formal Verification Of Jolt zk-VM
  6. Commit 57c142d builds on the recent leanprover/lean4:v4.34.1
    waterfall
    Small, configurable proof search for inductive Lean goals
  7. Commit f9e8bc5 builds on the recent leanprover/lean4:v4.34.0-rc2
    NavierStokesAndEuler
    Lean certificates accompanying Navier-Stokes and Euler results
  8. Commit a26427e builds on the old leanprover/lean4:v4.32.0-rc1
    kakeya
  9. 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.
  10. Commit 09b97db builds on the old leanprover/lean4:v4.33.0-rc1
    goldbach
    A Lean 4 formalization of Chen's theorem (Goldbach 1+2).

Recently Updated

  1. Commit 772f650 builds on the recent leanprover/lean4:v4.35.0-rc3
    TNLean
    Tensor-network theory, formalized in Lean 4: the fundamental theorem of matrix product states, canonical forms, parent Hamiltonians, matrix-product density operators, and projected entangled pair states, building on the QICLean quantum-information library
  2. Commit 2aede42 builds on the old leanprover/lean4:v4.30.0-rc2
    LiveLeanTriathlon
  3. Commit d09de25 builds on the old leanprover/lean4:v4.26.0
    FormalisingMathematics2026
    Course notes for Formalising Mathematics 2026
  4. Commit c82f7fd builds on the recent leanprover/lean4:v4.35.0-rc3
    TauCeti
    An AIs-welcome Lean library downstream of Mathlib: AI handle the implementation and review, humans write the roadmaps and review rubrics
  5. Commit 38f34ff 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.
  6. Commit a6d0d94 builds on the recent leanprover/lean4:v4.35.0-rc3
    Hex
    Development monorepo for Hex: verified computational algebra in Lean 4 (polynomial factoring, LLL, and friends). Released aggregate: https://github.com/leanprover/hex
  7. Commit 2c165a0 builds on the old leanprover/lean4:v4.29.0-rc8
    Analysis
    A Lean companion to Analysis I
  8. Commit 727e4d2 builds on the old leanprover/lean4:v4.31.0 after lake update
    Game
    Natural Number Game
  9. Commit b1bbb21 builds on the recent leanprover/lean4:v4.34.0-rc2
    hex
    Verified computational algebra in Lean 4: aggregator for the released hex libraries
  10. Commit e520539 builds on the recent leanprover/lean4:v4.34.0
    lean4-mlir
    Lean specification of neural architectures with verified GPU codegen.