leanprover-community/mathlib4
The math library of Lean 4
⚡ Executive Summary & Quick Facts
Authoritative Sourcemathlib4 is mathlib4 is an open-source project written in Lean: The math library of Lean 4..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), leanprover-community/mathlib4 has accumulated 4,413 GitHub stars and 1,814 forks. It is written in Lean, licensed under Apache-2.0, and ranks #2,977 globally. It is actively maintained with the latest commit recorded on Nov 2, 2026.”
| Repository | leanprover-community/mathlib4 ↗ |
|---|---|
| Primary Category | lean4 |
| Language & Stack | Lean |
| Software License | Apache-2.0 |
| Community Traction | ★ 4.4K stars · ⑂ 1.8K forks · #2,977 globally |
| Maintenance | ● Active (Last commit: Nov 2, 2026) · 3,009 open issues |
| Target Audience | Developers and engineering teams building with Lean, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 90/100 · Grade AYes, mathlib4 is actively maintained. Continuous telemetry recorded the last code commit on Nov 2, 2026 (1 days ago). Supported by 4,413 stars and 1,814 community forks, this repository holds a calculated health index of 90/100, reflecting very active (commits within last 14 days) and high open issue volume (3,009 open).
Star History
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+110
STARS · LAST 30 DAYS
4
PER DAY
#1
MOST-STARRED Lean
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +28 | +110 | +360 |
| Per day | 4 | 4 | 4 |
| Forks gained | +9 | +36 | +91 |
mathlib4 gained 110 stars in the last 30 days, about 4 a day, and now has 4.4K. It is about 5 years old and has averaged roughly 883 stars a year. It ranks #1 among Lean repositories and #2,977 across all languages on GitHubRepo.
Trending Record
2
DAYS ON TRENDING
#8156
BEST RANK
Nov 2, 2026
FIRST APPEARANCE
Active
STATUS TODAY
mathlib4 has maintained a continuous presence across global trending indexes, peaking at #8156. Below is the 30-day activity profile:
💡 Overview
mathlib4 is an open-source project written in Lean: The math library of Lean 4.
Engineered for speed, consistency, and developer ease, it solves common hurdles in lean4. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Lean for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/leanprover-community/mathlib4.git
cd mathlib4⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Lean environment and standard tooling
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
mathlib4 coordinates its core functionality through a modular Lean pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed mathlib4 into Lean backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open Apache-2.0 license.
🚀 Getting Started
Install mathlib4 using your package manager: `git clone https://github.com/leanprover-community/mathlib4.git`
Initialize your project workspace or configuration file for mathlib4.
Import mathlib4 into your codebase or invoke it directly from your terminal.
Execute your test suite or run `mathlib4 --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Lean, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
leanprover-community/mathlib4 is currently ranked #2,977 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,971 | ExcelDataReader/ExcelDataReader | C# | ★ 4.4K | Compare ↗ |
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| #2,976 | windirstat/windirstat | C++ | ★ 4.4K | Compare ↗ |
| #2,977 | leanprover-community/mathlib4 This Project | Lean | ★ 4.4K | |
| #2,977 | open-legal-products/mike | TypeScript | ★ 4.4K | Compare ↗ |
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Frequently Asked Questions
What does mathlib4 do? +
The math library of Lean 4
Is mathlib4 actively maintained in 2026? +
Yes, mathlib4 is actively maintained. The latest code push was recorded on Nov 2, 2026 (1 days ago). It holds a calculated Maintenance Health Score of 90/100 (A rating) with 4,413 stars and 3,009 open issues.
What language is mathlib4 written in? +
The primary language is Lean. Topics include: lean4.
How many stars does mathlib4 have? +
mathlib4 has 4,413 stars and 1,814 forks on GitHub.
How does mathlib4 rank among GitHub repositories? +
With 4,413 stars, leanprover-community/mathlib4 is ranked #2,977 globally across all repositories tracked on GitHubRepo and #1 among Lean projects.
What license is mathlib4 distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
