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arXiv 1601.04514math.DGmath.APmath.GT
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悬链面估计及其几何应用

The catenoid estimate and its geometric applications

Daniel Ketover, Fernando C. Marques, André Neves

摘要:

我们证明了一个尖锐的面积估计悬链,使我们能够排除在最小最大理论在几个设置的多重性现象。我们应用它证明了:i)具有正里奇曲率的三流形的宽度是由可定向的极小曲面实现的; ii)这类流形中的极小亏格Heegaard曲面可以保序为极小曲面; iii)Kapouleas-Yang的Clifford环面的“double”可以通过等变min-max过程变分构造.在高维情形下,我们还证明了具有正里奇曲率的流形的宽度是由一个指数为1的可定向极小超曲面来获得的。

英文摘要:

We prove a sharp area estimate for catenoids that allows us to rule out the phenomenon of multiplicity in min-max theory in several settings. We apply it to prove that i) the width of a three-manifold with positive Ricci curvature is realized by an orientable minimal surface ii) minimal genus Heegaard surfaces in such manifolds can be isotoped to be minimal and iii) the "doublings" of the Clifford torus by Kapouleas-Yang can be constructed variationally by an equivariant min-max procedure. In higher dimensions we also prove that the width of manifolds with positive Ricci curvature is achieved by an index 1 orientable minimal hypersurface.

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