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arXiv 1901.06962math.AP
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具有间接信号吸收的趋化模型分析

Analysis of a chemotaxis model with indirect signal absorption

Mario Fuest

摘要:

考虑光滑有界区域$Ω\subset \mathbb R^n$,$n \in \mathbb N$中的趋化模型\begin{align*} \begin{cases} u_t = Δu - \nabla \cdot (u \nabla v), \\ v_t = Δv - vw, \\ w_t = -δw + u \end{cases} \end{align*},其中$δ\gt 0$为给定参数.如果$n \le 2$或$\|v_0\|_{L^\infty(Ω)} \le \frac1{3n}$,我们证明了唯一的整体经典解$(u, v, w)$的存在性和$(u(\cdot, t), v(\cdot, t), w(\cdot, t))$向空间常数平衡点的收敛性,如$t \to \infty$。对于$n \le 2$这个例子,全局存在性的证明依赖于一个引导过程。作为一个出发点,我们推导出一个功能是次线性的$u$,这似乎是新的,在这种情况下的功能不等式。

英文摘要:

We consider the chemotaxis model \begin{align*} \begin{cases} u_t = Δu - \nabla \cdot (u \nabla v), \\ v_t = Δv - vw, \\ w_t = -δw + u \end{cases} \end{align*} in smooth, bounded domains $Ω\subset \mathbb R^n$, $n \in \mathbb N$, where $δ\gt 0$ is a given parameter. If either $n \le 2$ or $\|v_0\|_{L^\infty(Ω)} \le \frac1{3n}$ we show the existence of a unique global classical solution $(u, v, w)$ and convergence of $(u(\cdot, t), v(\cdot, t), w(\cdot, t))$ towards a spatially constant equilibrium, as $t \to \infty$. The proof of global existence for the case $n \le 2$ relies on a bootstrap procedure. As a starting point we derive a functional inequality for a functional being sublinear in $u$, which appears to be novel in this context.

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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