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arXiv 2210.07014math.AP
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具有坏死核的肿瘤生长模型的存在性结果及自由边界极限

Existence result and free boundary limit of a tumor growth model with necrotic core

Samiha Belmor

摘要:

我们分析了一个系统的交叉扩散方程模型的无血管肿瘤球体的生长。该模型考虑了两种非线性扩散效应:简并型和超扩散。我们证明了整体弱解的存在性,并证明了收敛到自由边界问题的Hele-Shaw型时的压力变得僵硬。我们还研究了解在$L^1-$ Lebesgue空间中的收敛速度。

英文摘要:

We analyze a system of cross-diffusion equations that models the growth of an avascular-tumor spheroid. The model incorporates two nonlinear diffusion effects, degeneracy type and super diffusion. We prove the global existence of weak solutions and justify the convergence towards the free boundary problem of the Hele-Shaw type when the pressure gets stiff. We also investigate the convergence rate of the solutions in $L^1-$Lebesgue spaces.

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