IDENTIFIABILITY OF DISTRIBUTIONS OF INDEPENDENT RANDOM VARIABLES BY LINEAR COMBINATIONS AND MOMENTS

IDENTIFIABILITY OF DISTRIBUTIONS OF INDEPENDENT RANDOM VARIABLES BY LINEAR COMBINATIONS AND MOMENTS
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独立随机变量分布的线性组合和矩的可辨识性

DOI:
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发表时间:
2000
期刊:
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通讯作者:
C. Rao
C. Rao
中科院分区:
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文献类型:
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作者:
G. Székely;C. Rao

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让X 1, X 2,…, X n是独立的随机变量。给定力矩EX j s (s= 1,2,…),m), (j= 1,2,…,n),线性形式Y i= Σ j=1 n a ij X j, i= 1,2,…的联合分布函数,k具有任意不消失的联合特征函数,唯一地确定x1, x2,…,如果n≤(k+m m+1),则X n(例外情况除外)。例如,一般条件下的四个矩和四个线性组合(稍后说明)决定了n=56个独立随机变量的分布,而不是57个。
Let X 1 , X 2 , ..., X n be independent random variables. Given the moments EX j s (s=1, 2,...,m), (j=1, 2,...,n), the joint distribution function of the linear forms Y i =Σ j=1 n a ij X j , i=1, 2,...,k with an arbitrary nonvanishing joint characteristic function uniquely determines the distributions of X 1 , X 2 , ..., X n (with trivial exceptions) iff n≤( k+m m+1 ). For example four moments and four linear combinations under general conditions (specified later) determine the distribution of n=56 independent random variables, but not of 57.