arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.04233math.APmath.DG
收藏

中曲率流变倍解的新概念:Allen-Cahn方程的收敛性和弱-强唯一性

A new varifold solution concept for mean curvature flow: Convergence of the Allen-Cahn equation and weak-strong uniqueness

Sebastian Hensel, Tim Laux

摘要:

提出了一个新的(两相)中曲率流弱解的概念,它同时具有(无条件)存在性和(弱-强)唯一性。这些解决方案是不断发展的varifolds,就像在Brakke的配方,但耦合到一个简单的输运方程的相体积。首先,我们表明,在完全相同的设置,在Ilmanen的证明[J。微分几何。38,417-461,(1993)],任何极限点的解决方案,艾伦-卡恩方程是一个变倍的解决方案,在我们的意义。其次,我们证明了Fischer等人[arXiv:2003.05478]意义上的任何校准流-因此任何中曲率流的经典解-在我们新的变倍解类中是唯一的。这与Brakke流的情况形成鲜明对比,Brakke流先验地可能在任何给定时间消失,因此是致命的非唯一性。最后,我们提出了一个扩展的解决方案的概念,多相的情况下,至少保证满足弱强唯一性原则。

英文摘要:

We propose a new weak solution concept for (two-phase) mean curvature flow which enjoys both (unconditional) existence and (weak-strong) uniqueness properties. These solutions are evolving varifolds, just as in Brakke's formulation, but are coupled to the phase volumes by a simple transport equation. First, we show that, in the exact same setup as in Ilmanen's proof [J. Differential Geom. 38, 417-461, (1993)], any limit point of solutions to the Allen-Cahn equation is a varifold solution in our sense. Second, we prove that any calibrated flow in the sense of Fischer et al. [arXiv:2003.05478] - and hence any classical solution to mean curvature flow - is unique in the class of our new varifold solutions. This is in sharp contrast to the case of Brakke flows, which a priori may disappear at any given time and are therefore fatally non-unique. Finally, we propose an extension of the solution concept to the multi-phase case which is at least guaranteed to satisfy a weak-strong uniqueness principle.

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。

↑