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arXiv 1202.5264math.AP
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退化两相自由边界问题的正则性

Regularity for degenerate two-phase free boundary problems

Raimundo Leitão, Olivaine S. de Queiroz, Eduardo V. Teixeira

摘要:

我们提供了一个相当完整的描述尖锐的正则性理论的一个家庭的异质,两相变分自由边界问题,$\mathcal{J}_γ\to $分钟,统治的非线性,$p$退化椭圆算子。包括在这样的家庭是异质的Prandtl-Batchelor型空化问题,奇异退化椭圆型方程和障碍型系统。与$\mathcal{J}_γ$相关的欧拉-拉格朗日方程沿自由界面$\{u= 0\}$变得奇异。奇异性的程度又由参数$γ\in [0,1]$定维。对于$0< γ< 1$,我们表明局部极小值是局部的类$C^{1,α}$的尖锐$α$取决于尺寸,$p$和$γ$。对于$γ= 0$,我们得到了一个定量的,渐近最优的结果,这保证了局部极小是Log-Lipschitz连续的。在这篇文章中证明的结果是新的,即使在经典的线性,非退化方程。

英文摘要:

We provide a rather complete description of the sharp regularity theory for a family of heterogeneous, two-phase variational free boundary problems, $\mathcal{J}_γ\to $ min, ruled by nonlinear, $p$-degenerate elliptic operators. Included in such family are heterogeneous cavitation problems of Prandtl-Batchelor type; singular degenerate elliptic equations; and obstacle type systems. The Euler-Lagrange equation associated to $\mathcal{J}_γ$ becomes singular along the free interface $\{u= 0\}$. The degree of singularity is, in turn, dimed by the parameter $γ\in [0,1]$. For $0< γ< 1$ we show local minima is locally of class $C^{1,α}$ for a sharp $α$ that depends on dimension, $p$ and $γ$. For $γ= 0$ we obtain a quantitative, asymptotically optimal result, which assures that local minima are Log-Lipschitz continuous. The results proven in this article are new even in the classical context of linear, nondegenerate equations.

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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