Ill-Posed

bluesky — Timothy Gowers — 16 Oct 2026

Many people just starting out on Lean formalization have enjoyed playing the Natural Numbers Game. Now Autumn Mapes has…

#proof-assistants #formal-verification #mathematical-education

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Many people just starting out on Lean formalization have enjoyed playing the Natural Numbers Game. Now Autumn Mapes has produced Visual Lean, isomorphic to the original but playable in a lovely intuitive way with clicking and dragging rather than typing.

leangame.autumnofautumn.com

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