arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.03062math.AP
收藏

具有尺寸结构的两相种群模型的Spectral theory和时间渐近性

Spectral theory and time asymptotics of size-structured two-phase population models

Mustapha Mokhtar-Kharroubi, Quentin Richard

摘要:

本文的工作提供了尺寸结构两相布居模型的一般谱分析。给出了系统的泛函分析结果。我们首先处理有限的最大尺寸的情况。利用系统的不同参数的性质刻画了相应的$L^{1}$半群的不可约性。我们还刻画了半群的谱隙性质。证明了半群的不可约性蕴含着谱隙的存在。特别是,我们提供了异步指数增长性的一般标准。我们还展示了如何处理时间渐近的情况下,缺乏不可约。最后,我们将理论推广到无限大尺寸的情况。

英文摘要:

This work provides a general spectral analysis of size-structured two-phase population models. Systematic functional analytic results are given. We deal first with the case of finite maximal size. We characterize the irreducibility of the corresponding $L^{1}$ semigroup in terms of properties of the different parameters of the system. We characterize also the spectral gap property of the semigroup. It turns out that the irreducibility of the semigroup implies the existence of the spectral gap. In particular, we provide a general criterion for asynchronous exponential growth. We show also how to deal with time asymptotics in case of lack of irreducibility. Finally, we extend the theory to the case of infinite maximal size.

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。

↑