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arXiv 1206.4089math.APmath.DG
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退化椭圆型方程的最优梯度连续性

Optimal gradient continuity for degenerate elliptic equations

Damião J. Araújo, Gleydson C. Ricarte, Eduardo V. Teixeira

摘要:

建立了一类二阶偏微分方程$\mathscr{L}(X, \nabla u, D^2 u) = f$解的新的最优梯度连续性估计,该方程的扩散性质(椭圆性)沿着现有解$\mathscr{S}(u) := \{X : \nabla u(X) = 0 \}$的\textit{a priori}未知奇异集退化.我们的主要结果的创新功能涉及其最优性-尖锐的,编码的平滑后效的运营商。这样的定量信息通常在分析一些分析和几何问题中起着决定性的作用。我们的结果是新的,甚至对经典方程$|\nabla u | \cdot Δu = 1$。我们进一步应用这些新的估计在椭圆偏微分方程理论中的一些著名的问题的研究。

英文摘要:

We establish new, optimal gradient continuity estimates for solutions to a class of 2nd order partial differential equations, $\mathscr{L}(X, \nabla u, D^2 u) = f$, whose diffusion properties (ellipticity) degenerate along the \textit{a priori} unknown singular set of an existing solution, $\mathscr{S}(u) := \{X : \nabla u(X) = 0 \}$. The innovative feature of our main result concerns its optimality -- the sharp, encoded smoothness aftereffects of the operator. Such a quantitative information usually plays a decisive role in the analysis of a number of analytic and geometric problems. Our result is new even for the classical equation $|\nabla u | \cdot Δu = 1$. We further apply these new estimates in the study of some well known problems in the theory of elliptic PDEs.

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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