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arXiv 1701.02411math.PR
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关于对称一维扩散

On symmetric one-dimensional diffusions

Liping Li, Jiangang Ying

摘要:

本文的主要目的是探讨与对称线性扩散相关的局部和正则Dirichlet型的结构。设$(\mathcal{E},\mathcal{F})$是$L^2(I,m)$上的正则局部Dirichlet型,其中$I$是区间,$m$是$I$上的全支集Radon测度.我们首先给出了$(\mathcal{E},\mathcal{F})$的一个完整表示,它表明$(\mathcal{E},\mathcal{F})$存在于至多可数个不相交的“有效”区间上,在每个区间上有相应的尺度函数,在这些区间之外的任何点都是线性扩散的陷阱.进一步,我们将给出$C_c^\infty(I)$是$(\mathcal{E},\mathcal{F})$的一个特殊标准核的充要条件,并当$C_c^\infty(I)$包含在$\mathcal{F}$中但不一定稠密于$\mathcal{E}_1$ -范数时,证明$C_c^\infty(I)$在$(\mathcal{E},\mathcal{F})$中的闭包.本文的部分动机是[Hamza,1975]的一个结果,在[FOT,定理3.1.6]中陈述,并提供了一个不同的观点,这个定理。为了说明我们的结果,提供了许多例子。

英文摘要:

The main purpose of this paper is to explore the structure of local and regular Dirichlet forms associated with symmetric linear diffusions. Let $(\mathcal{E},\mathcal{F})$ be a regular and local Dirichlet form on $L^2(I,m)$, where $I$ is an interval and $m$ is a fully supported Radon measure on $I$. We shall first present a complete representation for $(\mathcal{E},\mathcal{F})$, which shows that $(\mathcal{E},\mathcal{F})$ lives on at most countable disjoint `effective' intervals with corresponding scale function on each interval, and any point outside these intervals is a trap of the linear diffusion. Furthermore, we shall give a necessary and sufficient condition for $C_c^\infty(I)$ being a special standard core of $(\mathcal{E},\mathcal{F})$ and identify the closure of $C_c^\infty(I)$ in $(\mathcal{E},\mathcal{F})$ when $C_c^\infty(I)$ is contained but not necessarily dense in $\mathcal{F}$ relative to the $\mathcal{E}_1$-norm. This paper is partly motivated by a result of [Hamza, 1975], stated in [FOT, Theorem 3.1.6] and provides a different point of view to this theorem. To illustrate our results, many examples are provided.

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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