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与定义在赋范空间乘积的开集上、取值于拟完备局部凸线性空间的拉格朗日量相关联的普适算子诺特流

Universal operatorial Noether current associated with a quasi-complete locally convex linear space valued Lagrangian defined on an open set of a product of normed spaces

Benedetto Silvestri

arXiv 2610.09137首次发表:更新:

AI 中文总结

本文为局部凸向量值拉格朗日量建立变分框架,构造普适算子诺特流,证明其壳上守恒及无穷阶时的散度为零。

AI 中文摘要

在我们先前的工作\cite{sil09261621}中,针对$n$维流形$M$的开集上的局部凸向量值可积张量,本文构建了一个框架,用以处理与拉格朗日量$\mathscr{L}$相关的变分问题,以及与作用量$\phi$和$\omega$相关的壳上守恒律。$\mathscr{L}$是取值于拟完备Hausdorff局部凸空间$\mathcal{Z}$、定义在赋范空间的开集$O$上的$C^{p}$映射;$\phi$是由赋范空间$T$的开集$A$参数化的$C^{p}$作用,作用于取值于赋范空间$Y_{0}$、定义在$M$的图$\xi$的域$W$上的场空间$\mathfrak{Z}^{O}$;$\omega$是由$A$参数化的$W$上的$C^{p}$作用。通过\cite{sil09261621}中的结果,我们构造了$\mathfrak{A}:\mathfrak{Z}^{O}\times A\to\mathcal{M}(W,\mathcal{Z})$,其中$\mathfrak{A}(u,\eta)$是与$\mathscr{L}$、$u$和$\eta$相关的作用泛函。这里$\mathcal{M}(W,\mathcal{Z})=\mathcal{L}_{s}(\mathcal{H}(W),\mathcal{Z})$是$W$上取值于$\mathcal{Z}$的测度的局部凸空间。令$\mathcal{A}(u):A\to\mathcal{M}(W,\mathcal{Z})$使得$\mathcal{A}(u)(\eta)=\mathfrak{A}(u,\eta)$,我们断言$\mathcal{A}(u)$在壳外可微,并求出其微分映射在壳外和壳上的表达式。我们证明:若$\mathcal{A}(u)$在$0$处的微分映射为$0$,则$\mathscr{N}[u]$在壳上守恒;若$p=\infty$,则$\mathscr{N}[u]$的散度等于$0$,其中局部凸向量值向量场的散度在\cite{sil09261621}中定义并分析。这里$\mathscr{N}[u]$是$M$在$U=\xi(W)$上取值于$\mathcal{L}_{b}(T,\mathcal{Z})$的$C^{(p-1)}$向量场。

英文摘要

In the context of locally convex vector valued integrable tensors on open sets of a $n$-dimensional manifold $M$ developped in our previous work \cite{sil09261621}, in this paper we construct a framework in which to address both a variational problem associated with a Lagrangian $\mathscr{L}$, and a conservation law on-shell associated with actions $ϕ$ and $ω$. $\mathscr{L}$ is a $C^{p}$-map valued in a quasi-complete Hausdorff lcs $\mathcal{Z}$ and defined on an open set $O$ of a normed space, $ϕ$ is a $C^{p}$-action parametrized by an open $A$ of a normed space $T$, acting over the space $\mathfrak{Z}^{O}$ of fields valued in a normed space $Y_{0}$ and defined on $W$ domain of a chart $ξ$ of $M$; $ω$ is a $C^{p}$-action on $W$ parametrized by $A$. Via a result in \cite{sil09261621}, we construct $\mathfrak{A}:\mathfrak{Z}^{O}\times A\to\mathcal{M}(W,\mathcal{Z})$ where $\mathfrak{A}(u,η)$ is the action functional associated with $\mathscr{L}$, $u$ and $η$. Here $\mathcal{M}(W,\mathcal{Z})=\mathcal{L}_{s}(\mathcal{H}(W),\mathcal{Z})$ is the lcs of measures on $W$ and valued in $\mathcal{Z}$. By letting $\mathcal{A}(u):A\to\mathcal{M}(W,\mathcal{Z})$ be such that $\mathcal{A}(u)(η)=\mathfrak{A}(u,η)$, we state that $\mathcal{A}(u)$ is differentiable off-shell, find its differential map off and on-shell. We establish that if the differential map of $\mathcal{A}(u)$ on $0$ is $0$, then $\mathscr{N}[u]$ is conserved on-shell, and if $p=\infty$, then the divergence of $\mathscr{N}[u]$ equals $0$, where the divergence of a lcs valued vector field is defined and analyzed in \cite{sil09261621}. Here $\mathscr{N}[u]$ is a $\mathcal{L}_{b}(T,\mathcal{Z})$-valued $C^{(p-1)}$-vector field of $M$ on $U=ξ(W)$.

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