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arXiv 1608.01384math.PR
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截尾对称Lévy过程

Censored symmetric Lévy processes

Vanja Wagner

摘要:

本文研究了开集$D$上截尾对称纯间断Lévy过程的三种等价构造:通过相应的Dirichlet形式,通过在$D$外被杀死的Lévy过程的Feynman-Kac变换,以及通过Ikeda-Nagasawa-Watanabe拼接过程从同一被杀死的过程中得到的结果.利用与满足一定尺度条件的完备Bernstein函数相关联的广义光滑Besov型空间的$n$ -集的迹定理,分析了相应截尾Lévy过程的边界行为,确定了该过程在有限时间内逼近边界$\partial D$的条件.进一步证明了$κ$ -胖开集上纯不连续Lévy过程的格林函数的3G不等式及其推广形式的一个更强的形式.利用这一结果,我们得到了相应截尾过程的尺度不变Harnack不等式。

英文摘要:

We examine three equivalent constructions of a censored symmetric purely discontinuous Lévy process on an open set $D$; via the corresponding Dirichlet form, through the Feynman-Kac transform of the Lévy process killed outside of $D$ and from the same killed process by the Ikeda-Nagasawa-Watanabe piecing together procedure. By applying the trace theorem on $n$-sets for Besov-type spaces of generalized smoothness associated with complete Bernstein functions satisfying certain scaling conditions, we analyze the boundary behaviour of the corresponding censored Lévy process and determine conditions under which the process approaches the boundary $\partial D$ in finite time. Furthermore, we prove a stronger version of the 3G inequality and its generalized version for Green functions of purely discontinuous Lévy processes on $κ$-fat open sets. Using this result, we obtain the scale invariant Harnack inequality for the corresponding censored process.

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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