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arXiv 1702.06187q-bio.PEmath.AP
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特征结构群体Lotka-Volterra积分微分系统的全局稳定性

Global stability with selection in integro-differential Lotka-Volterra systems modelling trait-structured populations

Camille Pouchol, Emmanuel Trélat

摘要:

我们分析的渐近行为的积分微分方程建模$N$人口的相互作用,所有结构的不同特征。相互作用的非本地条款,涉及在每个人口中的个人总数的线性组合建模。这些模型已经被证明适合于癌症耐药性的建模,并且它们概括了通常的Lotka-Volterra常微分方程。我们的目标是给出所有物种持续存在的条件。通过对李雅普诺夫函数的分析,我们的第一个主要结果给出了一个简单而一般的相互作用矩阵的条件,以及收敛速度。第二个主要结果在互惠互动的特殊情况下建立了另一种类型的条件。当满足这些条件中的任何一个时,我们描述哪些性状被渐近选择。

英文摘要:

We analyse the asymptotic behaviour of integro-differential equations modelling $N$ populations in interaction, all structured by different traits. Interactions are modelled by non-local terms involving linear combinations of the total number of individuals in each population. These models have already been shown to be suitable for the modelling of drug resistance in cancer, and they generalise the usual Lotka-Volterra ordinary differential equations. Our aim is to give conditions under which there is persistence of all species. Through the analysis of a Lyapunov function, our first main result gives a simple and general condition on the matrix of interactions, together with a convergence rate. The second main result establishes another type of condition in the specific case of mutualistic interactions. When either of these conditions is met, we describe which traits are asymptotically selected.

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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