The future of mathematics: formally verified, collaboratively built, universally accessible. Mathlib - Lean 4's formally verified mathematics library.

Mathlib is a user maintained library for the Lean theorem prover. It contains both programming infrastructure and mathematics, as well as tactics that use the former and allow to develop the latter.

Mathlib is a community-driven library of formalized mathematics written in Lean. It provides the building blocks needed for mathematical research across many domains of mathematics and computer science.

The Lean mathematical library, mathlib, is a community-driven effort to build a unified library of mathematics formalized in the Lean proof assistant. The library also contains definitions useful for …

The mathlib library is designed as a basis for research level mathematics, as well as a standard library for programming in Lean. We build mathlib on top of a small core library, shipped with Lean, which …

At the heart of this transformation lies Mathlib, an open-source library of formal mathematics written using the Lean theorem prover. This community-driven effort to digitize mathematics is being …

mathlib is a maths library written in pure python, so that it can be used when there is no other option.

6 days ago · Reservoir is the package registry for Lake, the build system and package manager of the Lean programming language and theorem prover.

May 17, 2025 · If you find that a declaration seems to have disappeared, try adding import Mathlib at the top of the file, in case it has been moved to a different file. You can use #min_imports again …

Here topics are listed in the greatest generality we currently have in mathlib, hence some things may be difficult to recognize. We also have a page dedicated to undergraduate mathematics which may be …