# mathlib **Repository Path**: mirrors_leanprover-community/mathlib ## Basic Information - **Project Name**: mathlib - **Description**: Lean 3's obsolete mathematical components library: please use mathlib4 - **Primary Language**: Unknown - **License**: Apache-2.0 - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 0 - **Created**: 2022-01-05 - **Last Updated**: 2026-02-08 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README # Lean 3's mathlib > [!WARNING] > Lean 3 and Mathlib 3 are no longer actively maintained. > It is strongly recommended that you use [mathlib4](https://github.com/leanprover-community/mathlib4) for Lean 4 instead. (If you need to read the old `README.md`, please see `OLD_README.md`.)