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arXiv 1709.04086math.DG
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中曲率流自展开解的谱性质和刚度

Spectral properties and rigidity for self-expanding solutions of the mean curvature flows

Xu Cheng, Detang Zhou

摘要:

本文研究了中曲率流的自膨胀问题。首先,我们展示了离散的漂移拉普拉斯算子的频谱。其次给出了漂移拉普拉斯算子谱底的一个普适下界,并证明了这个下界的存在性当且仅当自扩张子是通过原点的欧几里德子空间.进一步,对于余维$1$的自扩张算子,我们证明了漂移Laplacian算子谱的底与加权稳定算子谱的底之间的一个不等式,并且证明了过原点的超平面是唯一的自扩张算子.在一定的条件下,证明了平均凸自扩张的过原点超平面在第二基本型范数平方上的唯一性。

英文摘要:

In this paper, we study self-expanders for mean curvature flows. First we show the discreteness of the spectrum of the drifted Laplacian on them. Next we give a universal lower bound of the bottom of the spectrum of the drifted Laplacian and prove that this lower bound is achieved if and only if the self-expander is the Euclidian subspace through the origin. Further, for self-expanders of codimension $1$, we prove an inequality between the bottom of the spectrum of the drifted Laplacian and the bottom of the spectrum of weighted stability operator and that the hyperplane through the origin is the unique self-expander where the equality holds. Also we prove the uniqueness of hyperplane through the origin for mean convex self-expanders under some condition on the square of the norm of the second fundamental form.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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