Seymour's Second Neighborhood Conjecture
minimum out-degree 7; the conjecture is open in general Superseded by a claimed proof of the full conjecture in the OpenAI math release (September 2026), see seymour-second-neighborhood-conjecture.
Exact FrontierDelta
Scope and record
Occurred: Oct 29, 2026
Delta type: REGISTRY REVISION
Assumptions: VibeMathed verification: unreviewed. Publication: preprint. AI contribution: ai-assisted. VibeMathed editorial classifications, scores, notes, relations, and dataset structure are CC BY 4.0. Source statements and linked content retain their own rights.
Canonical aliases: Seymour's Second Neighborhood Conjecture · Second neighborhood
Confidence: Not scored
Registry verification: unreviewed · preprint · partial
Attribution
VibeMathed
registry · event recorded by
ChatGPT 5.5 Pro
model · ai model contributor · OpenAI
Arpan Sadhukhan
human · human collaborator
R. B. Sandeep
human · human collaborator
Sagnik Sen
human · human collaborator
Lineage and corrections
Corrects Seymour's Second Neighborhood Conjecture →
Supersedes Seymour's Second Neighborhood Conjecture →
Seymour's Second Neighborhood Conjecture parent of this event
This event attributed to R. B. Sandeep
This event attributed to Arpan Sadhukhan
VibeMathed record: Seymour's Second Neighborhood Conjecture evidence for this event
Seymour's Second Neighborhood Conjecture evidence for this event
Stronger result in the OpenAI math release evidence for this event
This event attributed to Sagnik Sen
minimum out-degree 7; the conjecture is open in general Superseded by a claimed proof of the full conjecture in the OpenAI math release (September 2026), see seymour-second-neighborhood-conjecture. parent of this event
This event attributed to ChatGPT 5.5 Pro
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