Beyond Mathlib

The Lean research ecosystem, in one directory.

Browse 636 source-backed Lean ecosystem records from curated repositories and a pinned Reservoir snapshot. Exact Therefore declaration coverage is labelled separately from package and repository discovery.

Reservoir index b6ac225af74c backs 600 directory records. Provider metadata is discovery evidence, not proof verification or authorship.

636 of 636 projects

Package metadataProof corpus

EconCSLib

AI-assisted Lean formalization for Economics and Computation research

Declarations not yet indexedLean 4.30.0-rc2

Pinned Reservoir package record · checked 2026-07-25

Math
Package metadataLean library

flow

Reactive streams library for Lean 4 - Flow, SharedFlow, StateFlow, ProgramFlow, and ReactiveProgram

Declarations not yet indexedLean 4.32.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean tool

leansec

Total parser combinators library for Lean4

Declarations not yet indexedLean 4.20.0-rc5

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataTeaching project

pnP2023

Code and source for website for the course "Proofs and Programs", January 2023, Indian Institute of Science

Declarations not yet indexedLean 4.7.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

hale

Haskell-inspired libraries for Lean 4 with maximalist typing

Declarations not yet indexedLean 4.30.0-rc1

Pinned Reservoir package record · checked 2026-07-25

HaskellHttpWarpWeb Server
Package metadataLean library

Ipld.lean

a Lean4 implementation of the IPLD format

Declarations not yet indexedLean nightly-2023-01-10

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

Poseidon.lean

A Lean 4 implementation of the Poseidon zkSNARK-friendly hash function

Declarations not yet indexedLean nightly-2023-01-10

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

LeanSudoku

Playing Sudoku in the Lean 4 proof assistant

Declarations not yet indexedLean 4.13.0-rc3

Pinned Reservoir package record · checked 2026-07-25

Math
Package metadataLean library

json-schema

Json Schema lean implementation

Declarations not yet indexedLean 4.25.1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

LeanBridge

Link LMFDB and Lean

Declarations not yet indexedLean 4.31.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataProof corpus

bruhat-tits

A formalisation of the Bruhat-Tits tree in Lean4

Declarations not yet indexedLean 4.19.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataProof corpus

incompleteness

Formalize Incompleness Theorem Related Results

Declarations not yet indexedLean 4.16.0-rc2

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataProof corpus

SemicircleLaw

Formalization of Wigner's Semicircle Law in Lean

Declarations not yet indexedLean 4.24.0

Pinned Reservoir package record · checked 2026-07-25

MathProbabilityRandom Matrix Theory
Package metadataLean library

render

Verified renders of the Mandelbrot set

Declarations not yet indexedLean 4.27.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

MillerRabin

Miller–Rabin primality test in Lean

Declarations not yet indexedLean 4.22.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

Game

Knights and Knaves Educational Game in Lean 4

Declarations not yet indexedLean 4.29.1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

RustFFI

An RDF Library for Lean4

Declarations not yet indexedLean 4.6.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Lean package