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arXiv 0708.0887math.DG
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旋转对称空间中旋转超曲面的保体积中曲率流

Volume-preserving mean curvature flow of revolution hypersurfaces in a Rotationally Symmetric Space

Esther Cabezas-Rivas, Vicente Miquel

摘要:

在围绕轴旋转对称的环境空间(包括双曲空间和欧几里得空间)中,研究了旋转超曲面M在保体积中曲率流下的演化,该超曲面M由围绕旋转轴的图生成,其边界在两个全测地超曲面(简称tgh)中.本文证明了:a)当M_t不接触旋转轴时,流动存在,b)在存在的整个时间间隔内,b1)M_t的母曲线保持为图,b2)平均中曲率为正常数的双边有界; d)在M的n-体积与封闭体积相联系的适当假设下,我们获得了长时间存在性,并收敛到一个具有常中曲率的旋转超曲面.

英文摘要:

In an ambient space with rotational symmetry around an axis (which include the Hyperbolic and Euclidean spaces), we study the evolution under the volume-preserving mean curvature flow of a revolution hypersurface M generated by a graph over the axis of revolution and with boundary in two totally geodesic hypersurfaces (tgh for short). Requiring that, for each time t, the evolving hypersurface M_t meets such tgh ortogonally, we prove that: a) the flow exists while M_t does not touch the axis of rotation; b) throughout the time interval of existence, b1) the generating curve of M_t remains a graph, and b2) the averaged mean curvature is double side bounded by positive constants; c) the singularity set (if non-empty) is finite and discrete along the axis; d) under a suitable hypothesis relating the enclosed volume to the n-volume of M, we achieve long time existence and convergence to a revolution hypersurface of constant mean curvature.

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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