{"event":{"id":"evt-20261103-kungtraub","dedupe_key":"rts_milestone:rts_finding_7f1366966f8447a7ac75282be41f554b","event_type":"publication_or_official_action","title":"Colbrook publishes Kung–Traub conjecture proof and author-checked Lean formalization aided by ChatGPT","summary":"Matthew Colbrook submitted a 20 September 2026 preprint claiming a proof of the 1974 Kung–Traub optimal-order conjecture for memoryless root-finding, with a Lean formalization. Colbrook states ChatGPT 6 assisted Lean verification and ChatGPT 5.6/6 aided discussion, while the author reviewed and adopted the mathematical arguments. RTS discovered the September paper in November. The event date is its September submission, not its later discovery; the formalization has author-reported checks but no independently rerun build or completed peer review is asserted.","occurred_at":"2026-09-20T17:03:15.000Z","published_at":"2026-09-20T17:03:15.000Z","observed_at":"2026-11-03T05:57:37.565Z","reconstructed_at":null,"ingest_type":"live_evidence_only","locations":null,"status":"verified","confidence":0.93,"metadata":{"rts_finding_id":"rts_finding_7f1366966f8447a7ac75282be41f554b","epistemic_scope":"dated_publication_or_official_statement_only","source_bound":1,"evidence_only":1,"no_relation_onset":1,"no_civilization_snapshot":1,"global_novelty_not_exhaustively_proven":1,"original_occurrence_date_preserved":1},"created_at":"2026-11-03T06:24:56.577Z","updated_at":"2026-11-03T06:24:56.577Z"},"artifacts":[{"id":"art-20261103-kungtraub","dedupe_key":"9e2911b17dc076a18fb761f891bb3e9e35ae0d1b9cfd4fb505cc8a0f98676f68","canonical_url":null,"evidence_locator":"","artifact_type":"publication","title":"Colbrook publishes Kung–Traub conjecture proof and author-checked Lean formalization aided by ChatGPT","summary":"Matthew Colbrook submitted a 20 September 2026 preprint claiming a proof of the 1974 Kung–Traub optimal-order conjecture for memoryless root-finding, with a Lean formalization. Colbrook states ChatGPT 6 assisted Lean verification and ChatGPT 5.6/6 aided discussion, while the author reviewed and adopted the mathematical arguments. RTS discovered the September paper in November. The event date is its September submission, not its later discovery; the formalization has author-reported checks but no independently rerun build or completed peer review is asserted.","creator_entities":[],"released_at":"2026-09-20T17:03:15.000Z","content_hash":null,"metadata":{"rts_finding_id":"rts_finding_7f1366966f8447a7ac75282be41f554b","epistemic_scope":"dated_publication_or_official_statement_only","source_bound":1,"evidence_only":1,"no_relation_onset":1,"no_civilization_snapshot":1,"global_novelty_not_exhaustively_proven":1,"original_occurrence_date_preserved":1},"created_at":"2026-11-03T06:24:56.572Z","updated_at":"2026-11-03T06:24:56.572Z","relation":"documents"}],"signals":[]}