Measure concentration for a class of random processes
Measure concentration for a class of random processes
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DOI:
10.1007/s004400050154
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发表时间:
1998-03
影响因子:
2
通讯作者:
K. Marton
中科院分区:
文献类型:
--
作者:
K. Marton
LetX={Xi}i=−∞∞be a stationary random process with a countable alphabet and distributionq. Letq∞(·|x−k0) denote the conditional distribution ofX∞=(X1,X2,…,Xn,…) given thek-length past:Writed(1,x1)=0 if1=x1, andd(1,x1)=1 otherwise. We say that the processXadmits a joining with finite distanceuif for any two past sequences−k0=(−k+1,…,0) andx−k0=(x−k+1,…,x0), there is a joining ofq∞(·|−k0) andq∞(·|x−k0), say dist(0∞,X0∞|−k0,x−k0), such thatThe main result of this paper is the following inequality for processes that admit a joining with finite distance: