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arXiv 1502.00140math.PRmath.STstat.TH
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Gamma和Kummer分布的Matsumoto-Yor型特征的回归形式

Regression version of the Matsumoto-Yor type characterization of the gamma and Kummer distributions

Jacek Wesolowski

摘要:

在本文中,我们研究了Koudou和Vallois(2012)发现的gamma和Kummer独立变量的Matsumoto-Yor型性质。本文证明了当V = X + Y时,回归方程U =(1 + 1/(X + Y))=(1 + 1/X)的恒常性和当V时,回归方程1/U的恒常性,其中X和Y是独立的正随机变量,它们是伽玛分布和库默尔分布的特征。这个结果完成了Koudou和Vallois(2011,2012)在密度光滑假设下获得的U和V独立性的特征。由于我们使用拉普拉斯变换的微分方程,因此不需要密度假设。

英文摘要:

In this paper we study a Matsumoto-Yor type property for the gamma and Kummer inde- pendent variables discovered in Koudou and Vallois (2012). We prove that constancy of regressions of U = (1 + 1/(X + Y ))=(1 + 1/X) given V = X + Y and of 1/U given V , where X and Y are indepen- dent and positive random variables, characterizes the gamma and Kummer distributions. This result completes characterizations by independence of U and V obtained, under smoothness assumptions for densities, in Koudou and Vallois (2011, 2012). Since we work with differential equations for the Laplace transforms, no density assumptions are needed.

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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