Lancaster分布的距离相关系数
Distance Correlation Coefficients for Lancaster Distributions
摘要:
本文考虑了联合分布属于Lancaster分布类的随机向量间距离相关系数的计算问题。在温和的收敛条件下,我们推导出这些分布的距离协方差的一般级数表示。为了说明一般理论,我们应用级数表示推导出二元正态分布及其Lancaster型推广、多元正态分布、二元伽玛分布、泊松分布和负二项分布的距离协方差和距离相关系数的显式表达式.
英文摘要:
We consider the problem of calculating distance correlation coefficients between random vectors whose joint distributions belong to the class of Lancaster distributions. We derive under mild convergence conditions a general series representation for the distance covariance for these distributions. To illustrate the general theory, we apply the series representation to derive explicit expressions for the distance covariance and distance correlation coefficients for the bivariate normal distribution and its generalizations of Lancaster type, the multivariate normal distributions, and the bivariate gamma, Poisson, and negative binomial distributions which are of Lancaster type.
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