OpenAI reports bi-Lipschitz charts at every regular RCD point

For every n≥2 and real K, each regular point of a noncollapsed RCD(K,n) space has an ambient-open neighborhood bi-Lipschitz to an open subset of Euclidean n-space, with distortion bounded only by n.

Sources for this record

What was already known

Kapovitch and Mondino obtained an open manifold region with bi-Hölder charts around regular points. Bi-Lipschitz charts at every prescribed regular point, with the ambient distance, remained an explicit 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 Notable

Strengthens regular-point geometry of noncollapsed RCD spaces to uniform bi-Lipschitz coordinates.

Limitations

The theorem concerns noncollapsed RCD(K,n) spaces and every point all of whose tangents are Euclidean; the neighborhood may depend on the point.

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; technical verification remains Reported.

Read this published revision