年龄结构扩散种群平衡的稳定性和不稳定性

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-02-05 DOI:10.1007/s10884-023-10340-9

Christoph Walker

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引用次数: 0

摘要

对于描述具有非线性生命率的年龄结构人口空间移动的经典模型，建立了线性化稳定性和不稳定性原理。结果表明，平衡状态下相应线性化特征值的实部决定了后者的稳定性或不稳定性。证明的关键要素是与线性化问题相关的半群的最终紧凑性，它是通过扰动论证得出的。结果将通过实例加以说明。

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Stability and Instability of Equilibria in Age-Structured Diffusive Populations

The principle of linearized stability and instability is established for a classical model describing the spatial movement of an age-structured population with nonlinear vital rates. It is shown that the real parts of the eigenvalues of the corresponding linearization at an equilibrium determine the latter’s stability or instability. The key ingredient of the proof is the eventual compactness of the semigroup associated with the linearized problem, which is derived by a perturbation argument. The results are illustrated with examples.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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