Abstract.
Markov odometers are natural models for non-homogeneous Markov chains, and are natural generalisations of infinite product measures. We show how to calculate the critical dimension of these measures: this is an invariant which describes the asymptotic growth rate of sums of Radon-Nikodym derivatives. This interesting invariant appears to give a kind of entropy for non-singular odometer actions. The techniques require a law of large numbers for inhomogeneous Markov chains.
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Dooley, A., Mortiss, G. On the Critical Dimension and AC Entropy for Markov Odometers. Mh Math 149, 193–213 (2006). https://doi.org/10.1007/s00605-005-0372-6
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DOI: https://doi.org/10.1007/s00605-005-0372-6