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arXiv 1612.08387math.PR
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$r$ -过剩局部鞅为鞅的充要条件

Necessary and sufficient conditions for the $r$-excessive local martingales to be martingales

Mikhail Urusov, Mihail Zervos

摘要:

我们认为,减少和增加$r$ -过量的功能$φ_r$和$ψ_r$是与一个一维保守的定期连续强马尔可夫过程$X$的值在一个区间内的端点$α< β$。本文证明了$r$ -过剩局部鞅$\bigl( e^{-r (t \wedge T_α)} φ_r (X_{t \wedge T_α}) \bigr)$ $\bigl($,$\bigl( e^{-r (t \wedge T_β)} ψ_r (X_{t \wedge T_β}) \bigr) \bigr)$是严格局部鞅,如果边界点$α$(分别,$β$)是不可访问的和入口,和一个鞅否则。

英文摘要:

We consider the decreasing and the increasing $r$-excessive functions $φ_r$ and $ψ_r$ that are associated with a one-dimensional conservative regular continuous strong Markov process $X$ with values in an interval with endpoints $α< β$. We prove that the $r$-excessive local martingale $\bigl( e^{-r (t \wedge T_α)} φ_r (X_{t \wedge T_α}) \bigr)$ $\bigl($resp., $\bigl( e^{-r (t \wedge T_β)} ψ_r (X_{t \wedge T_β}) \bigr) \bigr)$ is a strict local martingale if the boundary point $α$ (resp., $β$) is inaccessible and entrance, and a martingale otherwise.

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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