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

Clear search
Package metadataLean library

test

SF.lean勉強会でigrepが書いたコードの記録

Declarations not yet indexedLean 4.29.1

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

discretion

Utilities for formalizing programming languages in Lean 4, along with other tidbits

Declarations not yet indexedLean 4.20.0-rc5

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

Dcc

The dependently-typed combinator calculus (DCC).

Declarations not yet indexedLean 4.30.0-rc2

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

foam

geometry of hospitality

Declarations not yet indexedLean 4.31.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

Koch

Koch 2D snowflake generator for 4D Golf

Declarations not yet indexedLean 4.7.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

HigherCategoryTheory

A formal verification project based on the work by Enric Cosme Llópez on "Higher-order categories".

Declarations not yet indexedLean 4.28.0

Pinned Reservoir package record · checked 2026-07-25

Math
Package metadataLean library

Game

Abstract Algebra Game

Declarations not yet indexedLean 4.28.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

langlib

Library for formal language theory in Lean 4

Declarations not yet indexedLean 4.28.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

pacioli

A verified core of accounting mechanics in Lean 4, paired with curated accounting judgment in the Open Knowledge Format (OKF).

Declarations not yet indexedLean 4.32.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

lean4-base64

RFC 4648 Base64 encoding and decoding for Lean 4

Declarations not yet indexedLean 4.30.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

SDG

Synthetic Differential Geometry in Lean

Declarations not yet indexedLean 4.30.0-rc2-less-choice

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

tCSlib

Lean 4 Theoretical Computer Science Library

Declarations not yet indexedLean 4.25.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

LeanUtils

Lean scripts for indexing sorries and verifying proofs

Declarations not yet indexedLean 4.17.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

numbers

Arbitrary Bit-Length Integers in Lean

Declarations not yet indexedLean 4.25.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

morpho-verity

Formal verification of Morpho Blue lending protocol using Verity (Lean 4)

Declarations not yet indexedLean 4.22.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

mrdi

An interface between Lean4 and Oscar.

Declarations not yet indexedLean 4.7.0

Pinned Reservoir package record · checked 2026-07-25

Lean package
Package metadataLean library

ennreal-arith

Arithmetic tactics for extended non-negative real numbers (ENNReal)

Declarations not yet indexedLean 4.22.0-rc3

Pinned Reservoir package record · checked 2026-07-25

ArithmeticENNRealProbabilityTactics
Package metadataLean library

MiscYD

Miscellaneous projects I am working on in Lean

Declarations not yet indexedLean 4.31.0

Pinned Reservoir package record · checked 2026-07-25

Additive CombinatoricsCombinatoricsConvex GeometryMath