A Hoeffding inequality for Markov chains
A Hoeffding inequality for Markov chains
复制标题
马尔可夫链的 Hoeffding 不等式
DOI:
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发表时间:
2018
影响因子:
0.5
通讯作者:
Shravas Rao
中科院分区:
文献类型:
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作者:
Shravas Rao
We prove deviation bounds for the random variable $sum_{i=1}^{n} f_i(Y_i)$ in which ${Y_i}_{i=1}^{infty}$ is a reversible Markov chain with stationary distribution and state space $[N]$, and $f_i: [N]
ightarrow [-a_i, a_i]$. Our bound improves upon previously known bounds in that the dependence is on $sqrt{a_1^2+cdots+a_n^2}$ rather than $max_{i}{a_i}sqrt{n}.$ We also prove deviation bounds for certain types of sums of vector--valued random variables obtained from a Markov chain in a similar manner. One application includes bounding the expected value of the Schatten $infty$-norm of a random matrix whose entries are obtained from a Markov chain.