Variance of partial sums of stationary sequences

Variance of partial sums of stationary sequences
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平稳序列部分和的方差

DOI:
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发表时间:
2012
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影响因子:
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通讯作者:
S. Utev
S. Utev
中科院分区:
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文献类型:
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作者:
George Deligiannidis;S. Utev

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设X1,X2,.是具有谱测度F和部分和Sn=X1+ Sn +Xn的弱平稳随机变量列的中心序列.我们证明了var(Sn)在无穷远处是指数γ正则变化的当且仅当G(x):=<$x−xF(dx)在原点(0)处是指数2−γ正则变化的
Let X1,X2,… be a centred sequence of weakly stationary random variables with spectral measure F and partial sums Sn=X1+⋯+Xn. We show that var(Sn) is regularly varying of index γ at infinity, if and only if G(x):=∫x−xF(dx) is regularly varying of index 2−γ at the origin (0