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arXiv 0912.0447math.DGmath.AP
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球面调和映射的正则性及其在Bernstein问题中的应用

The regularity of harmonic maps into spheres and applications to Bernstein problems

Juergen Jost, Yuanlong Xin, Ling Yang

摘要:

我们证明了正则性,并推导出先验估计的(弱)调和映射从黎曼流形到欧氏球面的假设下,图像避免了一些邻居的半赤道。证明结合了严格凸函数的构造和拟线性椭圆方程组的正则性理论。将这些结果应用于极小超曲面的球面和欧氏Bernstein问题,得到了球面中的紧致极小超曲面或欧几里得空间中的完备极小超曲面平凡的新条件.

英文摘要:

We show the regularity of, and derive a-priori estimates for (weakly) harmonic maps from a Riemannian manifold into a Euclidean sphere under the assumption that the image avoids some neighborhood of a half-equator. The proofs combine constructions of strictly convex functions and the regularity theory of quasi-linear elliptic systems. We apply these results to the spherical and Euclidean Bernstein problems for minimal hypersurfaces, obtaining new conditions under which compact minimal hypersurfaces in spheres or complete minimal hypersurfaces in Euclidean spaces are trivial.

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