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arXiv 1503.00378math.STstat.TH
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非中心卡方随机变量加权和分布函数的完整梯度法

Holonomic gradient method for distribution function of a weighted sum of noncentral chi-square random variables

Tamio Koyama, Akimichi Takemura

摘要:

本文应用完整梯度法计算独立非中心卡方随机变量加权和的分布函数。它是多元正态随机向量长度平方的分布函数。我们把这个分布看作是Fisher-Bingham分布的归一化常数在单位球面上的积分,并利用Fisher-Bingham分布的偏微分方程。

英文摘要:

We apply the holonomic gradient method to compute the distribution function of a weighted sum of independent noncentral chi-square random variables. It is the distribution function of the squared length of a multivariate normal random vector. We treat this distribution as an integral of the normalizing constant of the Fisher-Bingham distribution on the unit sphere and make use of the partial differential equations for the Fisher-Bingham distribution.

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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