The multivariate normal distribution and gamma distribution are used to define another form of multivariate t distribution, defined as the second class of multivariate t distribution, and second classes of multivariate t distribution model parameters of the UMRE estimation problem are also probed.%利用多元正态分布和gamma分布定义了另一种形式的多元t分布,称为第二类多元t分布,并研究了第二类多元t分布模型中参数的一致最小风险同变估计的存在性问题.
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