Lean Weekly News
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Ranked by a public rubric, not by votes: what a comment adds counts, not who wrote it. How comments are ranked · Comment rules
Summary
Juan J. Manfredi's Lean formalization proves the main results of OpenAI's October 4, 2026 preprint on infinity-harmonic functions, including that such functions on connected open sets in dimensions three and higher are C¹, relying only on Lean's three standard axioms.