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arXiv 0802.1185math.CA
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偶Calderon-Zygmund算子和拟共形映射的额外消去

Extra cancellation of even Calderon-Zygmund operators and quasiconformal mappings

Joan Mateu, Joan Orobitg, Joan Verdera

摘要:

本文讨论一类特殊的Beltrami系数,其相应的拟共形映射是bilipschitz.它们的形式是具有光滑边界的平面有界区域的特征函数乘以该区域上Lip类的密度。在论证中的关键事实是,即使卡尔德隆-齐格蒙德内核的特殊提取属性,即它们在半个单位球上的积分为零。这一特性以一种特别具有暗示性的方式表达出来,并显示出具有深远的影响。主要结果也可以看作是Beltrami方程的Lipschitz正则性结果,因此对于某些散度型的平面二阶椭圆型方程也是如此。

英文摘要:

We discuss a special class of Beltrami coefficients whose associated quasiconformal mapping is bilipschitz. These are of the form the characteristic function of a planar bounded domain with smooth boundary of class C 1+epsilon times a density of class Lip epsilon on the domain. The crucial fact in the argument is the special extracancellation property of even Calderon-Zygmund kernels, namely that they have zero integral on half the unit ball. This property is expressed in a particularly suggestive way and is shown to have far-reaching consequences. The main result may also be viewed as a Lipschitz regularity result for the Beltrami equation, and so for certain planar second order elliptic equations in divergence form.

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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