Boundedness in a quasilinear fully parabolic Keller-Segel system of higher dimension with logistic source
Boundedness in a quasilinear fully parabolic Keller-Segel system of higher dimension with logistic source
复制标题
具有逻辑源的高维拟线性全抛物线 Keller-Segel 系统中的有界性
DOI:
10.1016/j.jmaa.2015.04.093
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发表时间:
2015-03
影响因子:
1.3
通讯作者:
Zheng, Sining
中科院分区:
文献类型:
--
作者:
Yang, Cibing;Cao, Xinru;Jiang, Zhaoxin;Zheng, Sining
This paper deals with the higher dimension quasilinear parabolic–parabolic Keller–Segel system involving a source term of logistic type u t=∇⋅(ϕ (u)∇ u)− χ∇⋅(u∇ v)+ g (u), τ v t= Δ v− v+ u in Ω×(0, T), subject to nonnegative initial data and homogeneous Neumann boundary condition, where Ω is a smooth and bounded domain in R n, n≥ 2, ϕ and g are smooth and positive functions satisfying k s p≤ ϕ when s≥ s 0> 1, g (s)≤ a s− μ s 2 for s> 0 with g (0)≥ 0 and constants a≥ 0, τ, χ, μ> 0. It is known that the model without the logistic source admits both bounded and unbounded solutions, identified via the critical exponent 2 n. On the other hand, the model is just a critical case with the balance of logistic damping and aggregation effects, for which the property of solutions should be determined by the coefficients associated. In the present paper it is proved that there is θ 0> 0 such that the problem admits global bounded classical solutions whenever χ μ< θ 0, regardless of the size of initial data and diffusion. This shows the substantial effect of the logistic source has on the behavior of solutions.
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影响因子:
2.9
作者:
Xinru Cao;Sining Zheng
通讯作者:
Xinru Cao;Sining Zheng
影响因子:
1.9
作者:
Hieber Matthias;Pruss Jan
通讯作者:
Hieber Matthias;Pruss Jan
DOI:
10.1090/s0002-9947-1992-1046835-6
发表时间:
1992-02
影响因子:
1.3
作者:
Willi Jäger;S. Luckhaus
通讯作者:
Willi Jäger;S. Luckhaus
影响因子:
1.7
作者:
Tomasz Cieślak;M. Winkler
通讯作者:
Tomasz Cieślak;M. Winkler
影响因子:
2.9
作者:
M. Winkler
通讯作者:
M. Winkler