Erdős Problem 646 — qed.bot Claims, announcements and changes recorded against Erdős Problem 646. https://qed.bot/feeds/s/erdos-646.xml 2026-02-27T00:00:00Z qed.bot Erdős Problem 646 — full (Aristotle) urn:qed:2b519c74fd67 2026-02-27T00:00:00Z Berend (1997). Autonomy A1, evidence V1, fidelity F2.