https://leanprover-community.github.io/blog/enContents © 2026 <a href="mailto:">The Lean prover community</a> Thu, 21 May 2026 01:16:04 GMTNikola (getnikola.com)http://blogs.law.harvard.edu/tech/rsshttps://leanprover-community.github.io/blog/posts/affine-group-schemes-hopf-algebra/Yaël Dillies, Michał Mrugała, Andrew Yang<div><p>This February saw the birth of the <a href="https://github.com/YaelDillies/Toric"><strong>Toric</strong></a> project, whose aim is to build the theory of toric varieties following <em>Toric Varieties</em> by Cox, Little and Schenck.</p> <p>We soon discovered that toric varieties contained tori, and that Mathlib didn't.</p> <p>This blog post is a double announcement:</p> <ul> <li>The unexpected prerequisite of algebraic tori was recently cleared;</li> <li>We are looking for contributors to help with the second phase of the project, i.e. toric geometry and its relation to convex geometry.</li> </ul> <p><a href="https://leanprover-community.github.io/blog/posts/affine-group-schemes-hopf-algebra/">Read more…</a> (9 min remaining to read)</p></div>algebraic geometryTorichttps://leanprover-community.github.io/blog/posts/affine-group-schemes-hopf-algebra/Tue, 24 Jun 2025 16:40:00 GMT