Boundedness in a parabolic-elliptic chemotaxis-growth system under a critical parameter condition

Boundedness in a parabolic-elliptic chemotaxis-growth system under a critical parameter condition
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DOI:
10.1016/j.aml.2016.08.003
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发表时间:
2017-02
期刊:
Appl. Math. Lett.
影响因子:
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通讯作者:
Bingran Hu;Youshan Tao
Bingran Hu;Youshan Tao
中科院分区:
其他
文献类型:
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作者:
Bingran Hu;Youshan Tao

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考虑抛物-椭圆趋化-增长系统{ut = Δ u− χ <$u(um <$v)+ μ u(1− u α),x∈ Ω,t> 0,− Δ v+ v= u γ,x∈ Ω,t> 0,在光滑有界区域Ω <$RN,N≥ 1中的无通量边界条件下,其中χ,μ,m,α和γ是满足m≥ 1和γ≥ 1的正参数.最近,它已被证明在Galakhov等人。(2016)证明了如果α> m+ γ− 1或α= m+ γ− 1且μ> N α− 2 2(m− 1)+ N α χ,则对任意给定的u 0∈ W 1,∞(Ω),该系统具有整体有界古典解。本文的工作进一步表明,对于临界情形α= m+ γ− 1和μ= N α− 2 2(m− 1)+ N α χ,同样的结论仍然成立。
We consider the parabolic–elliptic chemotaxis-growth system {u t= Δ u− χ∇⋅(u m∇ v)+ μ u (1− u α), x∈ Ω, t> 0,− Δ v+ v= u γ, x∈ Ω, t> 0, under no-flux boundary conditions in a smoothly bounded domain Ω⊂ R N, N≥ 1, where χ, μ, m, α and γ are prescribed positive parameters fulfilling m≥ 1 and γ≥ 1. Recently, it has been proved in Galakhov et al.(2016) that if either α> m+ γ− 1 or α= m+ γ− 1 and μ> N α− 2 2 (m− 1)+ N α χ, for any given u 0∈ W 1,∞(Ω) this system possesses a global and bounded classical solution. The present work further shows that the same conclusion still holds for the critical case α= m+ γ− 1 and μ= N α− 2 2 (m− 1)+ N α χ.