中文

平稳序列部分和的方差

概率论 2013-10-22 v2

摘要

X1,X2,X_1,X_2,\ldots是中心化的弱平稳随机变量序列,具有谱测度FF,部分和Sn=X1++XnS_n=X_1+\cdots+X_n。我们证明,var(Sn)\operatorname {var}(S_n)在无穷远处是正则变化指数为γ\gamma的,当且仅当G(x):=xxF(dx)G(x):=\int_{-x}^xF(\mathrm {d}x)在原点处是正则变化指数为2γ2-\gamma的(0<γ<20<\gamma<2)。

关键词

引用

@article{arxiv.1205.4172,
  title  = {Variance of partial sums of stationary sequences},
  author = {George Deligiannidis and Sergey Utev},
  journal= {arXiv preprint arXiv:1205.4172},
  year   = {2013}
}

备注

Published in at http://dx.doi.org/10.1214/12-AOP772 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)