arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2002.05889math.AP
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一类二维变系数Ventcel问题的可解性

On the solvability of a two-dimensional Ventcel problem with variable coefficients

Antonio Greco, Giuseppe Viglialoro

摘要:

本文研究了一类混合边值问题\begin{equation}\label{ProblemAbstract} \tag{$\Diamond$} \begin{cases} -Δu = f &\mbox{in $Ω$,} \\ u = φ&\mbox{on $Γ_{\! D}$,} \\ u_ν- a_2 \, Δ_{τ\,} u + a_0 \, u = g &\mbox{on $Γ_{\! ν}$,} \end{cases} \end{equation},其中$Ω$是$\mathbb{R}^2$的某个有界区域,$\partial Ω=Γ_{\!D}\cup Γ_{\! ν}$,$ν$表示$Γ_{\! ν}$的法单位向量,$Δ_τ$表示沿~ $Γ_{\! ν}$的Laplace Beltrami算子.另外,$f(\bf x)$、$φ(\bf x)$、$a_2(\bf x)$、$a_0(\bf x)$和$g(\bf x)$是在$Ω$、$Γ_{\!D}$和$Γ_{\! ν}$上定义的方便函数,并且${\bf x} = (x,y)$表示二维数组。在适当的数据假设下,我们首先给出了问题弱解$u$的定义,然后我们证明了它是唯一可解的。此外,我们考虑一个特殊的情况下,\eqref{ProblemAbstract}出现在现实世界中的应用程序:我们讨论所得到的模型,并提供了一个明确的解决方案。

英文摘要:

This paper deals with the following mixed boundary value problem \begin{equation}\label{ProblemAbstract} \tag{$\Diamond$} \begin{cases} -Δu = f &\mbox{in $Ω$,} \\ u = φ&\mbox{on $Γ_{\! D}$,} \\ u_ν- a_2 \, Δ_{τ\,} u + a_0 \, u = g &\mbox{on $Γ_{\! ν}$,} \end{cases} \end{equation} where $Ω$ is some bounded domain of $\mathbb{R}^2$ with $\partial Ω=Γ_{\!D}\cup Γ_{\! ν}$, $ν$ indicating the normal unit vector to $Γ_{\! ν}$ and $Δ_τ$ the Laplace--Beltrami operator along~$Γ_{\! ν}$. Additionally, $f(\bf x)$, $φ(\bf x)$, $a_2(\bf x)$, $a_0(\bf x)$ and $g(\bf x)$ are convenient functions defined on $Ω$, $Γ_{\!D}$ and $Γ_{\! ν}$, and ${\bf x} = (x,y)$ denotes a two-dimensional array. Under suitable assumptions on the data, we first give the definition of a weak solution $u$ to the problem and then we prove that it is uniquely solvable. Further, we consider a particular case of \eqref{ProblemAbstract} arising in real-world applications: we discuss the resulting model and provide an explicit solution.

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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