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arXiv 2210.03451math.AP
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具有混合边界条件的椭圆算子分数幂域的Hölder正则性

Hölder Regularity for Domains of Fractional Powers of Elliptic Operators with Mixed Boundary Conditions

Robert Haller, Hannes Meinlschmidt, Joachim Rehberg

摘要:

本文研究非规则区域上椭圆型偏微分方程解在混合边界条件下的整体Hölder正则性。有两个主要结果。在第一章中,我们证明了如果一个椭圆型微分算子在负索伯列夫空间中的可积性$q > d$的实现域嵌入到一个Hölder连续函数空间中,那么这个算子的合适的分数幂的域也嵌入到这个空间中。然后,第二个主要结果确定了第一个前提确实得到了满足。证明沿着经典的技术的本地化,转换和反射,允许回落到经典的Ladyzhenskaya或Kinderlehrer的结果。我们的方法的主要特点之一是,我们不需要Lipschitz图的狄利克雷边界部分,但只有一个有趣的度量/测量理论条件的接口上的狄利克雷和诺依曼边界部分。2015年,特尔·埃尔斯特(英语:ter Elst)和艾斯伯格(英语:Elderberg)在相关的工作中提出了一个类似的条件,但现在的证明要简单得多,如果只限于空间维度4。

英文摘要:

This work is about global Hölder regularity for solutions to elliptic partial differential equations subject to mixed boundary conditions on irregular domains. There are two main results. In the first, we show that if the domain of the realization of an elliptic differential operator in a negative Sobolev space with integrability $q > d$ embeds into a space of Hölder continuous functions, then so do the domains of suitable fractional powers of this operator. The second main result then establishes that the premise of the first is indeed satisfied. The proof goes along the classical techniques of localization, transformation and reflection which allows to fall back to the classical results of Ladyzhenskaya or Kinderlehrer. One of the main features of our approach is that we do not require Lipschitz charts for the Dirichlet boundary part, but only an intriguing metric/measure-theoretic condition on the interface of Dirichlet- and Neumann boundary parts. A similar condition was posed in a related work by ter Elst and Rehberg in 2015, but the present proof is much simpler, if only restricted to space dimension up to 4.

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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