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The Euclidean-complete affine Bernstein problem in dimensions three through nine

Claims: for 3≤n≤93\le n\le9, every smooth affine maximal graph with positive-definite Hessian over an open convex domain whose graph is complete for the induced Euclidean metric is entire and quadratic, so an elliptic paraboloid; no growth or affine-completeness assumption. Via Trudinger-Wang it extends to affine-complete immersed hypersurfaces. The companion constructs a smooth nonquadratic entire solution with positive-definite Hessian in dimension ten, so the range cannot extend to n=10n=10. Dimensions n≥11n\ge11 are not addressed, and the dimension-ten example asserts no uniform Hessian bound or affine completeness.

Exact FrontierDelta

Prior state unknown→proved

Scope and record

Occurred: Sep 24, 2026

Delta type: SOURCE CLAIM

Assumptions: VibeMathed verification: lean-checked. Publication: announcement. AI contribution: ai-discovered. 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: The Euclidean-complete affine Bernstein problem in dimensions three through nine · Affine Bernstein in dimensions 3-9

Confidence: Not scored

Registry verification: lean checked · announcement · partial

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Attribution

VibeMathed
registry · event recorded by

Unreleased internal OpenAI model
model · ai model contributor · OpenAI

Artifacts and verifiers

Lean Comparator challenge AffineBernstein (not in formalization.yaml)

lean artifact · pending

Artifact ↗
Lean solution module OAI/Analysis/AffineBernstein/Main.lean

lean artifact · pending

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Lineage and corrections

Companion: A Smooth Nonquadratic Entire Affine Maximal Graph in Dimension Ten evidence for this event

This event attributed to Unreleased internal OpenAI model

The Euclidean-complete affine Bernstein problem in dimensions three through nine evidence for this event

VibeMathed record: The Euclidean-complete affine Bernstein problem in dimensions three through nine evidence for this event

The Euclidean-complete affine Bernstein problem in dimensions three through nine parent of this event

Lean Comparator challenge AffineBernstein (not in formalization.yaml) evidence for this event

Claims: for 3≤n≤93\le n\le9, every smooth affine maximal graph with positive-definite Hessian over an open convex domain whose graph is complete for the induced Euclidean metric is entire and quadratic, so an elliptic paraboloid; no growth or affine-completeness assumption. Via Trudinger-Wang it extends to affine-complete immersed hypersurfaces. The companion constructs a smooth nonquadratic entire solution with positive-definite Hessian in dimension ten, so the range cannot extend to n=10n=10. Dimensions n≥11n\ge11 are not addressed, and the dimension-ten example asserts no uniform Hessian bound or affine completeness. parent of this event

Lean solution module OAI/Analysis/AffineBernstein/Main.lean evidence for this event

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