arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.07030math.AP
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具有血管生成的自由边界肿瘤模型的渐近稳定性

Asymptotic stability for a free boundary tumor model with angiogenesis

Yaodan Huang, Zhengce Zhang, Bei Hu

摘要:

在本文中,我们研究了一个自由边界问题模拟实体肿瘤生长的血管营养物质的肿瘤,这是其特征在于在罗宾边界条件。不久前,他成立了一个[编辑]动力学39(2019)2473-2510],对于该模型,存在门限值$μ^\ast$,使得唯一的径向对称静止解对于$0<μ<μ^\ast$在非径向扰动下是线性稳定的,并且对于$μ>μ^\ast$是线性不稳定的。本文进一步研究了径向对称定常解的非线性稳定性,这就引入了一个重要的数学困难:由于模1项的扰动,极限球的中心事先是未知的。我们证明了一个新的不动点定理来解决这个问题,并最终得到了当忽略平移时,$0<μ<μ^\ast$的径向对称平稳解是非线性稳定的。

英文摘要:

In this paper, we study a free boundary problem modeling solid tumor growth with vasculature which supplies nutrients to the tumor; this is characterized in the Robin boundary condition. It was recently established [Discrete Cont. Dyn. Syst. 39 (2019) 2473-2510] that for this model, there exists a threshold value $μ^\ast$ such that the unique radially symmetric stationary solution is linearly stable under non-radial perturbations for $0<μ<μ^\ast$ and linearly unstable for $μ>μ^\ast$. In this paper we further study the nonlinear stability of the radially symmetric stationary solution, which introduces a significant mathematical difficulty: the center of the limiting sphere is not known in advance owing to the perturbation of mode 1 terms. We prove a new fixed point theorem to solve this problem, and finally obtain that the radially symmetric stationary solution is nonlinearly stable for $0<μ<μ^\ast$ when neglecting translations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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