Lie group action and stability analysis of stationary solutions for a free boundary problem modelling tumor growth
Lie group action and stability analysis of stationary solutions for a free boundary problem modelling tumor growth
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肿瘤生长建模自由边界问题平稳解的李群作用和稳定性分析
DOI:
10.1016/j.jde.2008.10.014
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发表时间:
2007-12
影响因子:
2.4
通讯作者:
Shangbin Cui
中科院分区:
文献类型:
--
作者:
Shangbin Cui
In this paper we study asymptotic behavior of solutions for a free boundary problem modelling tumor growth. We first establish a general result for differential equations in Banach spaces possessing a Lie group action which maps a solution into new solutions. We prove that a center manifold exists under certain assumptions on the spectrum of the linearized operator without assuming that the space in which the equation is defined is of either DA(θ) or DA(θ,∞) type. By using this general result and making delicate analysis of the spectrum of the linearization of the stationary free boundary problem, we prove that if the surface tension coefficient γ is larger than a threshold value γ*then the unique stationary solution is asymptotically stable modulo translations, provided the constant c is sufficiently small, whereas if γ<γ*then this stationary solution is unstable.
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