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arXiv 2104.12205math.APmath.FA
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一致(反)最大值原理的算子理论方法

An operator theoretic approach to uniform (anti-)maximum principles

Sahiba Arora, Jochen Glück

AI总结:

本文融合Takáč的抽象算子理论思想与最终正算子半群新进展,给出一般情形下(反)最大值原理的充要条件,并用于判定和解释多种微分算子的相关性质。

摘要:

最大值原理与一致反最大值原理是PDE理论中一个普遍存在的课题,与Krein–Rutman定理以及预解式的核估计密切相关。我们采纳Takáč的一个经典思想——在抽象算子理论框架中证明(反)最大值原理——并将其与最终正算子半群理论的近期思想相结合。这使我们能够在非常一般的设定下导出(反)最大值原理的充要条件。因此,对于大量具体的微分算子,我们既能够证明也能够证伪(反)最大值原理。此外,对于若干已知满足或不满足反最大值原理的算子,我们的理论为这种行为提供了非常清晰简洁的解释。

英文摘要:

Maximum principles and uniform anti-maximum principles are a ubiquitous topic in PDE theory that is closely tied to the Krein--Rutman theorem and kernel estimates for resolvents. We take up a classical idea of Takáč - to prove (anti-)maximum principles in an abstract operator theoretic framework - and combine it with recent ideas from the theory of eventually positive operator semigroups. This enables us to derive necessary and sufficient conditions for (anti-)maximum principles in a very general setting. Consequently, we are able to either prove or disprove (anti-)maximum principles for a large variety of concrete differential operators. As a bonus, for several operators that are already known to satisfy or to not satisfy anti-maximum principles, our theory gives a very clear and concise explanation of this behaviour.

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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