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arXiv 1012.0601math.DG
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具有Neumann自由边界条件的中曲率流的奇异集

On the singular set of mean curvature flows with Neumann free boundary conditions

Amos N. Koeller

摘要:

本文考虑光滑支撑面上支持的具有Neumann自由边界条件的中曲率流的$n$维超曲面。我们证明了奇异集的Hausdorff $n$ -测度为零。事实上,我们考虑两种类型的支持和流动表面之间的相互作用。在弱相互作用的情况下,我们不需要比在无边界的情况下做进一步的假设就可以得到我们的结果。在较强相互作用的情况下,我们只需要作附加的假设,即$H_Σ>0$,即支撑面是平均凸的。在这种情况下,我们继续证明,在没有平均凸性假设的情况下,结果一般是不正确的。

英文摘要:

We consider $n$-dimensional hypersurfaces flowing by mean curvature flow with Neumann free boundary conditions supported on a smooth support surface. We show that the Hausdorff $n$-measure of the singular set is zero. In fact, we consider two types of interaction between the support and flowing surfaces. In the case of weaker interaction, we need make no further assumptions than in the case without boundary to achieve our result. In the case of stronger interaction, we need only make the additional assumption that $H_Σ>0$, that is, that the support surface be mean convex. We go on, in this case, to show that the result is not, in general, true without the mean convexity assumption.

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