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arXiv 2302.09684math.AP
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一类广义扩散捕食模型的鲁棒多重性结果

A robust multiplicity result in a generalized diffusive predator-prey model

Julián López-Gómez, Eduardo Muñoz-Hernández

摘要:

本文分析了作者在\cite{LGMH20}中引入的广义空间非均匀扩散捕食-食饵模型,其相互作用项依赖于饱和系数$m(x)\gneq0$ .由于由$\|m\|_\infty$测得的饱和项的振幅增大到无穷大,因此在半平凡正解线性稳定的参数区域中建立了至少两个共存状态的存在,而不管模型设置中剩余函数系数的大小和形状如何。在某些特殊情况下,可以构造一个共存态的$S$形分量,这导致至少存在三个共存态,尽管这种多重性发生在半平凡正解线性不稳定的参数区域内。因此,这些多重性结果继承了相当不同的性质。

英文摘要:

This paper analyzes the generalized spatially heterogeneous diffusive predator-prey model introduced by the authors in \cite{LGMH20}, whose interaction terms depend on a saturation coefficient $m(x)\gneq0$. As the amplitude of the saturation term, measured by $\|m\|_\infty$, blows up to infinity, the existence of, at least, two coexistence states, is established in the region of the parameters where the semitrivial positive solution is linearly stable, regardless the sizes and the shapes of the remaining function coefficients in the setting of the model. In some further special cases, an $S$-shaped component of coexistence states can be constructed, which causes the existence of, at least, three coexistence states, though this multiplicity occurs within the parameter regions where the semitrivial positive solution is linearly unstable. Therefore, these multiplicity results inherit a rather different nature.

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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