OpenAI reports symmetry of semialgebraic bounded domains with compact quotient

Every nonempty connected bounded semialgebraic subset that is open in a complex affine algebraic variety is smooth and biholomorphic to a bounded symmetric domain if a discrete group of biholomorphisms acts properly with compact quotient.

Sources for this record

What was already known

Kollár and Pardon posed this bounded semialgebraic affine-domain question while studying varieties with semialgebraic universal covers. The compact quotient gives uniformity but does not assume a transitive automorphism group (companion manuscript introduction, pp. 1–2).

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

Answers the bounded-domain symmetry question of Kollár and Pardon.

Limitations

The selected theorem concerns bounded semialgebraic affine domains with proper compact-quotient group action; it does not by itself classify all semialgebraic universal covers of projective varieties. Finite stabilizers and singular affine ambient varieties are allowed.

Technical verification Formal (Lean 4)

OpenAI reports a Lean proof matching the selected claim.

Formal checking

The pinned Lean note formalizes smoothness and bounded symmetric-domain structure under the stated proper cocompact action, allowing finite stabilizers and singular affine ambient space.

Checker
OpenAI-reported Lean 4 / Comparator
Scope
A nonempty connected bounded semialgebraic subset relatively open in a complex affine algebraic variety is smooth and biholomorphic to a bounded symmetric domain when a discrete biholomorphism group acts properly with compact quotient.
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 companion manuscript, attribution, prior-work, and exact Lean-scope review for non-notifying local inclusion.

Read this published revision