OpenAI reports the second Kahn–Kalai threshold bound

For every finite simple graph H with h≥1 edges and at most n vertices, the threshold for G(n,p) to contain an ordinary copy of H is at most C p_E(n,H)(1+log₂ h) for a universal C.

Sources for this record

What was already known

Kahn and Kalai conjectured that the expectation obstruction determines graph-containment thresholds within a logarithmic factor uniformly over growing target graphs. The manuscript distinguishes this graph-specific question from the previously resolved abstract threshold conjecture.

AI involvement AI-led

OpenAI credits itself as manuscript author and states that its internal frontier model produced the results in this release. Individual human input is not detailed enough to establish task-only autonomy.

OpenAI is named as author on the manuscript, and its release attributes the results to an internal frontier model. The individual human input is not detailed enough to establish autonomy.

Importance Major

Resolves the second Kahn–Kalai conjecture with a logarithm depending on target edge count.

Limitations

The claim concerns ordinary, not induced, copies of H; p_E uses the manuscript’s one-half expected-copy convention.

Technical verification Formal (Lean 4)

OpenAI reports a Lean proof matching the selected claim.

Formal checking

The pinned OpenAI Lean scope note identifies this selected claim.

Checker
OpenAI-reported Lean 4 / Comparator
Scope
For every finite simple graph H with h≥1 edges and at most n vertices, the threshold for G(n,p) to contain an ordinary copy of H is at most C p_E(n,H)(1+log₂ h) for a universal C.
Basis
Reported by the linked checker
Evidence source

Checking a formal statement does not establish that it matches the original problem.

Human understanding Few

Few is the default when evidence for a higher level is insufficient. No named person is documented as explaining the central argument for this assessed contribution.

Correction and publication history

2026-10-18 · publication

Primary manuscript, attribution, prior-work, and scoped checking review for non-notifying local inclusion.

Read this published revision