Erdős Problem 263 — qed.bot Claims, announcements and changes recorded against Erdős Problem 263. https://qed.bot/feeds/s/erdos-263.xml 2026-05-09T00:00:00Z qed.bot Erdős Problem 263 — partial (Aristotle, Claude Opus 4.7, GPT-5.5 Pro) urn:qed:f476ac41fc25 2026-05-09T00:00:00Z Partial result (Lean) (solution to second part). Autonomy A3, evidence V2, fidelity F2.