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arXiv 1502.00874math.APmath.DG
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李群上自由到第2步的图的中曲率流的正则性

Regularity of mean curvature flow of graphs on Lie groups free up to step 2

Luca Capogna, Giovanna Citti, Maria Manfredini

摘要:

我们认为(光滑)的解决方案的中曲率流的有界域上的李群自由到第二步(不一定是幂零的),赋予一个参数家庭的黎曼度量$σ_\e$崩溃的subRiemann度量$σ_0$作为$\e\to 0$。我们建立$C^{k,α}$估计,这是一致的$\e\to 0$,并作为一个结果证明了长时间存在的subRiemann中曲率流的图。我们的证明扩展到设置的每一个步骤2卡诺群(不一定是自由的),并可以适应以下我们以前的工作在\cite{CCM3}的全变差流。

英文摘要:

We consider (smooth) solutions of the mean curvature flow of graphs over bounded domains in a Lie group free up to step two (and not necessarily nilpotent), endowed with a one parameter family of Riemannian metrics $σ_\e$ collapsing to a subRiemannian metric $σ_0$ as $\e\to 0$. We establish $C^{k,α}$ estimates for this flow, that are uniform as $\e\to 0$ and as a consequence prove long time existence for the subRiemannian mean curvature flow of the graph. Our proof extend to the setting of every step two Carnot group (not necessarily free) and can be adapted following our previous work in \cite{CCM3} to the total variation flow.

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