Property of the large densities in a two-species and two-stimuli chemotaxis system with competitive kinetics

Property of the large densities in a two-species and two-stimuli chemotaxis system with competitive kinetics
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具有竞争动力学的两种物种和两种刺激趋化系统中大密度的特性

DOI:
10.1016/j.jmaa.2021.125066
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发表时间:
2021-02
影响因子:
1.3
通讯作者:
Mu Chunlai
Mu Chunlai
中科院分区:
数学3区
文献类型:
--
作者:
Yang Hongying;Tu Xinyu;Mu Chunlai

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本文研究了具有两个信号的两种群趋化系统{ut = Δ u− χ 1 <$$>(u <$v)+ μ 1 u}的初边值问题(1− u− a 1 w),x∈ Ω,t> 0,v t= Δ v− v+ w,x∈ Ω,t> 0,w t= Δ w− χ 2 <$$>(w <$z)+ μ 2 w(1− w− a2 u),x∈ Ω,t> 0,z t= Δ z− z+ u,x∈ Ω,t> 0在球Ω <$Rn,n≥ 3的齐次Neumann边界条件下,参数χ i,ai,μ i(i= 1,2)为正.对于某些低能的初始数据,尽管存在竞争动力学的影响,也证明了物种可能会出现大密度现象。
In this work, we are concerned with the initial-boundary value problem for the two-species chemotaxis system with two signals given by {u t= Δ u− χ 1∇⋅(u∇ v)+ μ 1 u (1− u− a 1 w), x∈ Ω, t> 0, v t= Δ v− v+ w, x∈ Ω, t> 0, w t= Δ w− χ 2∇⋅(w∇ z)+ μ 2 w (1− w− a 2 u), x∈ Ω, t> 0, z t= Δ z− z+ u, x∈ Ω, t> 0 under the homogeneous Neumann boundary conditions in a ball Ω⊂ R n, n≥ 3, the parameters χ i, a i, μ i (i= 1, 2) are positive. For some lower energy initial data, in spite of the influence of competitive kinetics, it is proved that the species may exhibit large densities phenomenon.
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