中文

高维趋化-消耗模型中若干更尖锐的有界性条件

偏微分方程分析 2021-09-15 v2

摘要

对于经典的零通量趋化-消耗模型 \begin{equation*} u_t= \Delta u - \chi \nabla \cdot (u \nabla v) \quad \textrm{and}\quad v_t=\Delta v- uv, \quad \text{ with } (x,t)\in \Omega \times (0,T_{max}), \end{equation*} 其中 Ω\OmegaRn\mathbb{R}^n 中有界光滑区域,n3n\geq 3χ\chi 为某正数且 Tmax(0,]T_{max} \in (0,\infty],Tao在一篇论文中建立了如下结论:对每一组充分正则的初始数据 u(x,0)=u0(x)0u(x,0)=u_0(x)\geq 0v(x,0)=v0(x)0v(x,0)=v_0(x) \geq 0,存在 χ(v0L(Ω))\chi(\lVert v_0 \rVert_{L^\infty(\Omega)}) 使得对所有 0<χχ(v0L(Ω))0<\chi\leq \chi(\lVert v_0 \rVert_{L^\infty(\Omega)}),该初边值问题在 Ω×(0,)\Omega \times (0,\infty) 中有唯一有界经典解。本文在 n5n\geq 5 时,对更大的常数 χ(v0L(Ω))\chi(\|v_0\|_{L^{\infty}(\Omega)}) 取值也得到了相同结论。

关键词

引用

@article{arxiv.2109.06052,
  title  = {On some sharper boundedness conditions in the higher-dimensional chemotaxis-consumption model},
  author = {Silvia Frassu and Giuseppe Viglialoro},
  journal= {arXiv preprint arXiv:2109.06052},
  year   = {2021}
}

备注

The authors were informed from one of their colleagues that a sharper result was already available in the literature