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Precise large deviations for sums of random vectors with dependent components of consistently varying tails

机译:尾向量一致的相关分量的随机向量之和的精确大偏差

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摘要

Let {X (i) = (X (1,i) ,...,X (m,i) )(aS), i 1} be a sequence of independent and identically distributed nonnegative m-dimensional random vectors. The univariate marginal distributions of these vectors have consistently varying tails and finite means. Here, the components of X (1) are allowed to be generally dependent. Moreover, let N(center dot) be a nonnegative integer-valued process, independent of the sequence {X (i) , i 1}. Under several mild assumptions, precise large deviations for S (n) = I pound (i=1) (n) X (i) and S (N(t)) = I pound (i=1) (N(t)) X (i) are investigated. Meanwhile, some simulation examples are also given to illustrate the results.
机译:令{X(i)=(X(1,i),...,X(m,i))(aS ),i 1}是独立且分布均匀的非负m维随机向量的序列。这些向量的单变量边际分布具有连续变化的尾部和有限的均值。在此,X(1)的成分通常是相关的。此外,令N(中心点)是一个非负整数值的过程,与序列{X(i),i 1}无关。在几个温和的假设下,S(n)= I磅(i = 1)(n)X(i)和S(N(t))= I磅(i = 1)(N(t))的精确大偏差X(i)被调查。同时,还给出了一些仿真实例来说明结果。

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