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.

433 of 636 projects

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Package metadataLean library

Game

Natural Number Game

Declarations not yet indexedLean 4.23.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

smt

Tactics for discharging Lean goals into SMT solvers.

Declarations not yet indexedLean 4.32.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

veil

A verifier for automated and interactive proofs about transition systems.

Declarations not yet indexedLean 4.24.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

compfiles

Catalog Of Math Problems Formalized In Lean

Declarations not yet indexedLean 4.32.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

proofwidgets

Helper toolkit for creating your own Lean 4 UserWidgets

Declarations not yet indexedLean 4.33.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

REPL

A simple REPL for Lean 4, returning information about errors and sorries.

Declarations not yet indexedLean 4.33.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

llmlean

LLMs + Lean, on your laptop or in the cloud

Declarations not yet indexedLean 4.23.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

Clean

Lean circuit DSL

Declarations not yet indexedLean 4.30.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

doc-gen4

Document Generator for Lean 4

Declarations not yet indexedLean 4.32.1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

Loom

Loom is a framework for automated generation of foundational multi-modal verifiers. This repository is a mirror with stable snapshots. Submit issues and PRs here.

Declarations not yet indexedLean 4.24.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

yatima

A zero-knowledge Lean4 compiler and kernel

Declarations not yet indexedLean nightly-2023-01-10

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

render

A simple raytracer written in Lean 4

Declarations not yet indexedLean 4.8.0-rc1

Pinned Reservoir package record · checked 2026-07-25

Raytracing
Package metadataLean library

verbose

Natural language tactics to teach mathematics using Lean 4

Declarations not yet indexedLean 4.31.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

lib

LeanEuclid is a benchmark for autoformalization in the domain of Euclidean geometry, targeting the proof assistant Lean.

Declarations not yet indexedLean 4.19.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Exact source indexedLean library

quantumInfo

Quantum information theory in Lean 4

115 indexed declarationsLean 4.28.0

Pinned Reservoir package record · checked 2026-07-25

braketbundledcapacitydistribution
Package metadataLean library

verso-manual

The Lean reference manual

Declarations not yet indexedLean 4.32.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

ZeroToQED

From Zero to QED: An informal introduction to formality with Lean 4

Declarations not yet indexedLean 4.30.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Exact source indexedLean library

debate

Formalizing stochastic doubly-efficient debate

52 indexed declarationsLean 4.8.0

Pinned Reservoir package record · checked 2026-07-25

arithbasicbasicschernoff