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Large Language ModelsAI Coding AssistantsZenn AI/MLPublished: Sep 29, 2026, 10:00 JST

Lean 4 test: AI proof code fails as-is

Lean 4 test: AI proof code fails as-is

Testing three short problems with Lean 4, the author found AI math explanations were correct while the proposed code would not run as-is. In one case, adding a small condition let a once-false proposition produce passing code.

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