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2018 Fluctuations of the empirical measure of freezing Markov chains
Florian Bouguet, Bertrand Cloez
Electron. J. Probab. 23: 1-31 (2018). DOI: 10.1214/17-EJP130


In this work, we consider a finite-state inhomogeneous-time Markov chain whose probabilities of transition from one state to another tend to decrease over time. This can be seen as a cooling of the dynamics of an underlying Markov chain. We are interested in the long time behavior of the empirical measure of this freezing Markov chain. Some recent papers provide almost sure convergence and convergence in distribution in the case of the freezing speed $n^{-\theta }$, with different limits depending on $\theta <1,\theta =1$ or $\theta >1$. Using stochastic approximation techniques, we generalize these results for any freezing speed, and we obtain a better characterization of the limit distribution as well as rates of convergence and functional convergence.


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Florian Bouguet. Bertrand Cloez. "Fluctuations of the empirical measure of freezing Markov chains." Electron. J. Probab. 23 1 - 31, 2018.


Received: 11 May 2017; Accepted: 15 December 2017; Published: 2018
First available in Project Euclid: 16 January 2018

zbMATH: 1390.60264
MathSciNet: MR3751077
Digital Object Identifier: 10.1214/17-EJP130

Primary: 60F05, 60J10, 60J25


Vol.23 • 2018
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