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arXiv 1507.04017math.PR
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一类广义Gamma卷积的Gamma(k)-分布的尺度混合

A class of scale mixtures of gamma(k)-distributions that are generalized gamma convolutions

Anita Behme, Lennart Bondesson

摘要:

设$ k >0 $为整数,$ Y $为标准Gamma $(k)$分布随机变量。设$ X $是一个独立的正随机变量,其密度为$ k.$阶的双曲单调(HM),则$Y\cdot X$和$Y/X $都有广义伽玛卷积(GGC)分布.这一结果扩展了Roynette等人2009年的结果,Roynette等人治疗了$ k=1 $病例,但未使用HM概念。应用在漂移理论的扩散和理论的指数泛函的Lévy过程中提到。

英文摘要:

Let $ k >0 $ be an integer and $ Y $ a standard Gamma$(k)$ distributed random variable. Let $ X $ be an independent positive random variable with a density that is hyperbolically monotone (HM) of order $ k.$ Then $Y\cdot X$ and $Y/X $ both have distributions that are generalized gamma convolutions (GGCs). This result extends a result of Roynette et al. from 2009 who treated the case $ k=1 $ but without use of the HM-concept. Applications in excursion theory of diffusions and in the theory of exponential functionals of Lévy processes are mentioned.

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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