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arXiv 1701.03348math.AP
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二阶绝对极小元的存在性、唯一性和结构

Existence, Uniqueness and Structure of Second Order absolute minimisers

Nikos Katzourakis, Roger Moser

摘要:

设$Ω\subseteq \mathbb{R}^n$是有界开$C^{1,1}$集.本文证明了在$\mathrm{F}$上的自然假设下,在给定$u$和$\mathrm{D} u$的边界条件下,泛函\[ \mathrm{E}_\infty (u,\mathcal{O})\, :=\, \| \mathrm{F}(\cdot, Δu) \|_{L^\infty( \mathcal{O} )}, \ \ \ \mathcal{O} \subseteq Ω\text{ measurable}, \]在$\partial Ω$上存在唯一的二阶绝对极小元$u_\infty$.我们还证明了$u_\infty$是部分光滑的,并且存在调和函数$f_\infty \in L^1(Ω)$使得对所有$x \in \{f_\infty \neq 0\}$都有\[ \mathrm{F}(x, Δu_\infty(x)) \, =\, e_\infty\, \mathrm{sgn}\big(f_\infty(x)\big) \],其中$e_\infty$是全局能量的下确界.

英文摘要:

Let $Ω\subseteq \mathbb{R}^n$ be a bounded open $C^{1,1}$ set. In this paper we prove the existence of a unique second order absolute minimiser $u_\infty$ of the functional \[ \mathrm{E}_\infty (u,\mathcal{O})\, :=\, \| \mathrm{F}(\cdot, Δu) \|_{L^\infty( \mathcal{O} )}, \ \ \ \mathcal{O} \subseteq Ω\text{ measurable}, \] with prescribed boundary conditions for $u$ and $\mathrm{D} u$ on $\partial Ω$ and under natural assumptions on $\mathrm{F}$. We also show that $u_\infty$ is partially smooth and there exists a harmonic function $f_\infty \in L^1(Ω)$ such that \[ \mathrm{F}(x, Δu_\infty(x)) \, =\, e_\infty\, \mathrm{sgn}\big(f_\infty(x)\big) \] for all $x \in \{f_\infty \neq 0\}$, where $e_\infty$ is the infimum of the global energy.

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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