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Boundedness and asymptotic behavior in a fully parabolic chemotaxis-growth system with signal-dependent sensitivity

Boundedness and asymptotic behavior in a fully parabolic chemotaxis-growth system with... This paper deals with a fully parabolic chemotaxis-growth system with signal-dependent sensitivity $$\left\{\begin{array}{ll}u_t=\Delta u-\nabla\cdot(u\chi(v)\nabla v)+\mu u(1-u), \quad &\quad(x,t)\in\Omega\times (0,\infty),\\ v_{t}=\varepsilon \Delta v+h(u,v), \quad &\quad(x,t)\in \Omega\times (0,\infty),\end{array}\right.$$ u t = Δ u - ∇ · ( u χ ( v ) ∇ v ) + μ u ( 1 - u ) , ( x , t ) ∈ Ω × ( 0 , ∞ ) , v t = ε Δ v + h ( u , v ) , ( x , t ) ∈ Ω × ( 0 , ∞ ) , under homogeneous Neumann boundary conditions in a bounded domain $${\Omega\subset {\mathbb{R}}^{n} (n\geq1)}$$ Ω ⊂ R n ( n ≥ 1 ) with smooth boundary, where $${\varepsilon\in(0,1), \mu>0}$$ ε ∈ ( 0 , 1 ) , μ > 0 , the function $${\chi(v)}$$ χ ( v ) is the chemotactic sensitivity and h(u,v) denotes the balance between the production and degradation of the chemical signal which depends explicitly on the living organisms. Firstly, by using an iterative method, we derive global existence and uniform boundedness of solutions for this system. Moreover, by relying on an energy approach, the asymptotic stability of constant equilibria is studied. Finally, we shall give an example to illustrate the theoretical results. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Evolution Equations Springer Journals

Boundedness and asymptotic behavior in a fully parabolic chemotaxis-growth system with signal-dependent sensitivity

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References (46)

Publisher
Springer Journals
Copyright
Copyright © 2016 by Springer International Publishing
Subject
Mathematics; Analysis
ISSN
1424-3199
eISSN
1424-3202
DOI
10.1007/s00028-016-0344-4
Publisher site
See Article on Publisher Site

Abstract

This paper deals with a fully parabolic chemotaxis-growth system with signal-dependent sensitivity $$\left\{\begin{array}{ll}u_t=\Delta u-\nabla\cdot(u\chi(v)\nabla v)+\mu u(1-u), \quad &\quad(x,t)\in\Omega\times (0,\infty),\\ v_{t}=\varepsilon \Delta v+h(u,v), \quad &\quad(x,t)\in \Omega\times (0,\infty),\end{array}\right.$$ u t = Δ u - ∇ · ( u χ ( v ) ∇ v ) + μ u ( 1 - u ) , ( x , t ) ∈ Ω × ( 0 , ∞ ) , v t = ε Δ v + h ( u , v ) , ( x , t ) ∈ Ω × ( 0 , ∞ ) , under homogeneous Neumann boundary conditions in a bounded domain $${\Omega\subset {\mathbb{R}}^{n} (n\geq1)}$$ Ω ⊂ R n ( n ≥ 1 ) with smooth boundary, where $${\varepsilon\in(0,1), \mu>0}$$ ε ∈ ( 0 , 1 ) , μ > 0 , the function $${\chi(v)}$$ χ ( v ) is the chemotactic sensitivity and h(u,v) denotes the balance between the production and degradation of the chemical signal which depends explicitly on the living organisms. Firstly, by using an iterative method, we derive global existence and uniform boundedness of solutions for this system. Moreover, by relying on an energy approach, the asymptotic stability of constant equilibria is studied. Finally, we shall give an example to illustrate the theoretical results.

Journal

Journal of Evolution EquationsSpringer Journals

Published: Jun 6, 2016

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