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A version of Kac's lemma on first return times for suspension flows

 

In this article we study the mean return times to a given set for suspension flows. In the discrete time setting, this corresponds to the classical version of Kac’s lemma [11] that the mean of the first return time to a set with respect to the normalized probability measure is one. In the case of suspension flows we provide formulas to compute the mean return time. In particular, this varies linearly with continuous reparametrizatons of the flow and takes into account the mean escaping time from the original set.

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2014
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