{"event":{"id":"evt-hist-phase35-matroid-logconcavity-preprint","dedupe_key":"research_publication:2026-10-12:researchers-publish-counterexamples-to-matroid-chow-polynomial-log-concavity","event_type":"research_publication","title":"Researchers publish counterexamples to matroid Chow polynomial log-concavity","summary":"arXiv abstract states explicit counterexamples; existence verified, mathematical validity not independently adjudicated.","occurred_at":"2026-10-12T00:00:00.000Z","published_at":"2026-10-12T00:00:00.000Z","observed_at":"2026-10-18T12:30:00.000Z","reconstructed_at":"2026-10-18T12:30:00.000Z","ingest_type":"historical_backfill","locations":null,"status":"verified","confidence":0.8,"metadata":{"evidence_only":1,"global_novelty_unproven":1,"independent_outcomes_unproven":1,"original_index_position":1279},"created_at":"2026-10-19T06:05:46.995Z","updated_at":"2026-10-19T06:05:46.995Z"},"artifacts":[{"id":"art-hist-phase35-matroid-logconcavity-preprint","dedupe_key":"579e817d123f6354e5ba6ca0223582de715ce7a54f5841aee0dbf2d90ac71268","canonical_url":"https://arxiv.org/abs/2610.17135","evidence_locator":"","artifact_type":"original_publication","title":"Researchers publish counterexamples to matroid Chow polynomial log-concavity","summary":"","creator_entities":[],"released_at":"2026-10-12T00:00:00.000Z","content_hash":null,"metadata":[],"created_at":"2026-10-19T06:05:46.990Z","updated_at":"2026-10-19T06:05:46.990Z","relation":"documented_by"}],"signals":[]}