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arXiv 2303.07568math.AP
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一类具有Dirichlet条件的食饵趋向系统共存态的全局分支

Global bifurcation of coexistence states for a prey-taxis system with Dirichlet conditions

Shanbing Li, Mingxin Wang

摘要:

本文研究了一类食饵具有趋性的捕食-食饵系统的定常边值问题\begin{equation*} \left\{\begin{array}{ll} {\rm div}\left(d(v)\nabla u-uχ(v)\nabla v\right)+λu-u^2 +γu F(v)=0, & x \in Ω,\\[1mm] D Δv+μv-v^2-u F(v)=0, & x \in Ω,\\[1mm] u=v=0, & x \in \partial Ω. \end{array}\right. \end{equation*}的正解,并讨论了$u$(分别为. $v$)表示捕食者的种群密度(分别为猎物)。特别是,$χ(v)$的存在代表了捕食者向猎物增加的梯度方向移动的趋势。以$λ$为分歧参数,对正解集的全局分歧结构进行了详细的描述。因此,参数的范围内发现,该系统承认正解。

英文摘要:

This paper is concerned with positive solutions of boundary value problems \begin{equation*} \left\{\begin{array}{ll} {\rm div}\left(d(v)\nabla u-uχ(v)\nabla v\right)+λu-u^2 +γu F(v)=0, & x \in Ω,\\[1mm] D Δv+μv-v^2-u F(v)=0, & x \in Ω,\\[1mm] u=v=0, & x \in \partial Ω. \end{array}\right. \end{equation*} This is the stationary problem associated with the predator-prey system with prey-taxis, and $u$ (resp. $v$) denotes the population density of predator (resp. prey). In particular, the presence of $χ(v)$ represents the tendency of predators to move toward the increasing preys gradient direction. Regarding $λ$ as a bifurcation parameter, we make a detailed description for the global bifurcation structure of the set of positive solutions. So that ranges of parameters are found for which the system admits positive solutions.

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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