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arXiv 0711.0863math.AP
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无界域上拟线性系统的适定性及相关性质

On properness and related properties of quasilinear systems on unbounded domains

Stefan Krömer, Markus Lilli

摘要:

本文的目的是为分析索伯列夫空间中序列的紧性提供工具,特别是当序列被某些非线性算子映射到紧集上时。在这里,我们的重点在于一个非常普遍的一类非线性算子所产生的准线性系统的偏微分方程的二阶,在散度型。我们的方法,一个合适的分解引理的基础上,承认一些固有的损失的紧凑性的问题的讨论,例如,由于一个域与无限的措施或一个较低的阶项与临界增长。作为一个应用,我们得到的适当性,这是相当容易验证比定义的表征。所提出的方法也可用于检验变分问题的Palais-Smale条件。

英文摘要:

The purpose of this paper is to provide tools for analyzing the compactness of sequences in Sobolev spaces, in particular if the sequence gets mapped onto a compact set by some nonlinear operator. Here, our focus lies on a very general class of nonlinear operators arising in quasilinear systems of partial differential equations of second order, in divergence form. Our approach, based on a suitable decomposition lemma, admits the discussion of problems with some inherent loss of compactness, for example due to a domain with infinite measure or a lower order term with critical growth. As an application, we obtain a characterization of properness which is considerably easier to verify than the definition. The methods presented can also be used to check Palais--Smale conditions for variational problems.

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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