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CMC hypersurfaces with canonical principal direction in space forms

机译:在空间形态中具有规范主方向的CMC超曲面

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A hypersurface M subset of (M) over bar of the space form (M) over bar has a canonical principal direction (CPD) relative to the closed and conformal vector field Z of (M) over bar if the projection Z(T) of Z to M is a principal direction of M. We show that CPD hypersurfaces with constant mean curvature are foliated by isoparametric hypersurfaces. In particular, we show that a CPD surface with constant mean curvature of space form (M) over bar is invariant by the flow of a Killing vector field whose action is polar on (M) over bar. As consequence we show that a compact CPD minimal surface of the sphere S-3 is a Clifford torus. Finally, we consider the case when a CPD Euclidean hypersurface has zero GaussKronecker curvature. (C) 2016 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim
机译:如果 Z 到 M 的投影 Z(T) 是 M 的主方向,则空间形式 (M) over bar 的 (M) over bar 的超曲面 M 子集相对于 (M) over bar 的闭合和共形向量场 Z 具有规范主方向 (CPD)。我们表明,具有恒定平均曲率的CPD超曲面被等参数超曲面叶化。特别是,我们表明,在条形上具有恒定平均曲率 (M) 的 CPD 曲面在条形上是不变的,因为 Killing 向量场的作用在 (M) 上是极性的。因此,我们证明了球体 S-3 的紧凑 CPD 最小表面是克利福德环面。最后,我们考虑了 CPD 欧几里得超曲面的高斯克罗内克曲率为零的情况。(C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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