OpenAI reports numerical semiampleness for nef Kähler adjoint classes

On a smooth connected compact Kähler manifold, if B is an effective rational simple-normal-crossing divisor with coefficients below one, M is a nef rational line bundle, K_X+B is pseudo-effective, and K_X+B+M is nef, then its real Bott–Chern first Chern class is represented by a semiample rational line bundle.

Sources for this record

What was already known

Lazić and Peternell formulated generalized abundance in this numerical form and proved surface and selected threefold cases. Projective positive-part results were available; the manuscript extends the conclusion to the compact Kähler setting (manuscript introduction, pp. 2–3).

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 Notable

Proves numerical semiampleness of a broad class of nef adjoint classes on compact Kähler manifolds.

Limitations

This is equality of real first Chern classes after a possible flat change. It does not assert semiampleness of the original adjoint line bundle or arbitrary nef b-divisors.

Technical verification Reported

Reported is the default when evidence for a higher level is insufficient. The OpenAI-authored manuscript reports and argues the result, but the reviewed sources do not document a completed check of the full assessed claim.

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, and prior-work review for non-notifying local inclusion.

Read this published revision