- The Gowers-Green-Manners-Tao proof of Marton's polynomial Freiman-Ruzsa conjecture has now been completely formalised by a team led by Tao. It took three weeks! The project was run on the Lean Zulip. https://leanprover.zulipchat.com/#narrow/stream/412902-Polynomial-Freiman-Ruzsa-conjecture/topic/Project.20completed!.20.20Thoughts.20and.20reflections.3F/near/405996596 9 comments math