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arXiv 0905.2401math.PR
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Levy过程指数泛函的尾渐近性:卷积等价情形

Tail asymptotics for exponential functionals of Levy processes: the convolution equivalent case

Víctor Rivero

摘要:

本文利用卷积等价Levy测度确定了Levy过程的指数泛函的右尾分布的下降率。我们的主要结果建立,它减少的右尾的图像下的指数函数的Levy措施的基础Levy过程。证明的方法依赖于波动理论的Levy过程和一个明确的路径表示的指数功能的指数功能的二元从属。我们的技术使我们能够建立相当一般的估计的措施,从零的基本利维过程反映在其过去的下确界,其面积下的指数的游览路径超过一个给定的值。

英文摘要:

We determine the rate of decrease of the right tail distribution of the exponential functional of a Levy process with a convolution equivalent Levy measure. Our main result establishes that it decreases as the right tail of the image under the exponential function of the Levy measure of the underlying Levy process. The method of proof relies on fluctuation theory of Levy processes and an explicit path-wise representation of the exponential functional as the exponential functional of a bivariate subordinator. Our techniques allow us to establish rather general estimates of the measure of the excursions out from zero for the underlying Levy process reflected in its past infimum, whose area under the exponential of the excursion path exceed a given value.

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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