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arXiv · 2601.10125

Calabi affine maximal surfaces and centroaffine Bernstein problems

Yalin Sun·Cheng Xing·Ruiwei Xu
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Abstract

Motivated by Calabi's calculation of the second variation sign for locally strongly convex affine maximal surfaces in equiaffine geometry, we first prove that every Calabi extremal surface is also maximal in the Calabi affine geometry. By employing suitably chosen orthonormal frame fields and analyzing the corresponding Codazzi equations, we then obtain local classifications for certain special classes of Calabi affine maximal surfaces and hyperbolic centroaffine extremal surfaces. These examples inspire the construction of new, complete Calabi affine maximal surfaces and centroaffine extremal hypersurfaces. Notably, the complete centroaffine extremal hypersurfaces we establish answer all five centroaffine Bernstein problems posed by Li- Li-Simon in 2004.

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Yalin Sun, Cheng Xing, Ruiwei Xu. 2026-01-15. Calabi affine maximal surfaces and centroaffine Bernstein problems. https://arxiv.org/abs/2601.10125

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