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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
justifying In this paper, we give explicit estimate on the rate of convergence of the transition probabilities to the stationary distribution for a class of exponential ergodic Markov chains. Our results are different from earlier estimates using coupling theory and from estimates using stochastically monotone. The estimates show a noticeable improvement on existing results if Markov chains contain instantaneous state or nonconservative state. The method of proof uses existing result of discrete time Markov chain, together with $h-$ skeleton. We apply this results, Ray-Knight compactification and $mbox{It}hat{o}$ excursion theory to two examples: a class of singular Markov chains and Kolmogorov matrix. In addition, we apply the Ray-Knight compactification, $mbox{It}hat{o}$ excursion theory and explicit estimate for convergence rates of continuous time markov chains to two examples: a class of singular Markov chains and Kolmogorovmatrix.
Keywords:exponential ergodicity; Markov chain; exponential ergodicity; Ray-Knight compactification; Poisson point process