Existence of Front–Back-Pulse Solutions of a Three-Species Lotka–Volterra Competition–Diffusion System

Existence of Front–Back-Pulse Solutions of a Three-Species Lotka–Volterra Competition–Diffusion System
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三类Lotka-Volterra竞争-扩散系统前-后脉冲解的存在性

DOI:
10.1007/s10884-021-10090-6
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发表时间:
2021
影响因子:
1.3
通讯作者:
Chiun
Chiun
中科院分区:
数学3区
文献类型:
--
作者:
Chueh;Chiun

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在强竞争条件下,研究了三种群Lotka-Volterra竞争扩散系统的非单调行波解的存在性.行波解可以看作是空间中向量场的异宿轨道。在对方程参数的适当假设下,我们应用异宿轨道的分支理论,证明了一个三物种行波可以从两个两物种波分支到一个共同的平衡点。得到的三组分波的三个分量都是正的,并且具有一个是前波,一个是后波,第三个分量是前波和后波之间的脉冲,其中间部分较长,接近常数。作为结果的应用,我们找到了方程参数的几个显式区域,在这些区域中三种群行波发生分支。
The existence of nonmonotone traveling wave solutions of the three-species Lotka–Volterra competition diffusion system under strong competition is established. A traveling wave solution can be considered as a heteroclinic orbit of a vector field in. Under suitable assumptions on parameters of the equations, we apply a bifurcation theory of heteroclinic orbits to show that a three-species traveling wave can bifurcate from two two-species waves which connect to a common equilibrium. The three components of the three-species wave obtained are positive and have the profiles that one is a front, one is a back, and the third component is a pulse between the previous two with a long middle part close to a constant. As applications of our result, we find several explicit regions of parameters of the equations where the bifurcation of three-species traveling waves occur.
弱相互作用的前波和后波的动力学
DOI: --
发表时间: 2007
期刊: Toyama Math. J. 30
影响因子: --
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