https://leanprover-community.github.io/blog/enContents © 2026 <a href="mailto:">The Lean prover community</a> Fri, 07 Aug 2026 19:26:04 GMTNikola (getnikola.com)http://blogs.law.harvard.edu/tech/rsshttps://leanprover-community.github.io/blog/posts/first-lean-release/Scott Morrison<div><p>Lean 4 has just made its first official stable release, with the arrival of <a href="https://github.com/leanprover/lean4/releases/tag/v4.0.0"><code>v4.0.0</code></a>. We're excited to transition from only providing nightly releases to having regular stable releases.</p> <p><a href="https://leanprover-community.github.io/blog/posts/first-lean-release/">Read more…</a> (1 min remaining to read)</p></div>https://leanprover-community.github.io/blog/posts/first-lean-release/Fri, 08 Sep 2023 05:58:40 GMThttps://leanprover-community.github.io/blog/posts/intro-to-mathport/Scott Morrison<div><p><code>mathport</code> is the tool we're planning on using to help us port <code>mathlib</code> to Lean 4. It has mostly been written by Mario Carneiro and Daniel Selsam, and Gabriel Ebner and I have been making some fixes.</p> <p>To provide some context, <a href="https://github.com/leanprover-community/mathlib">mathlib</a> is the primary library for mathematics in Lean 3, containing over 700k lines of code and growing fast! Lean 4 now has a preliminary release, and we would really like to transition to building a mathematics library in Lean 4. While the type theory and kernel in Lean 4 are quite similar from a user point of view to Lean 3, it is certainly not the case that we can run Lean 3 code in Lean 4. Our aspiration is to achieve a "semi-automated" port.</p> <p><a href="https://leanprover-community.github.io/blog/posts/intro-to-mathport/">Read more…</a> (10 min remaining to read)</p></div>https://leanprover-community.github.io/blog/posts/intro-to-mathport/Wed, 22 Dec 2021 12:41:00 GMT