Israel Journal of Mathematics

, Volume 139, Issue 1, pp 29–65 | Cite as

Sharp polynomial estimates for the decay of correlations

  • Sébastien Gouëzel


We generalize a method developed by Sarig to obtain polynomial lower bounds for correlation functions for maps with a countable Markov partition. A consequence is that LS Young’s estimates on towers are always optimal. Moreover, we show that, for functions with zero average, the decay rate is better, gaining a factor 1/n. This implies a Central Limit Theorem in contexts where it was not expected, e.g.,x+Cx 1+α with 1/2⩽α<1. The method is based on a general result on renewal sequences of operators, and gives an asymptotic estimate up to any precision of such operators.


Central Limit Theorem Fourier Coefficient Transfer Operator Banach Algebra Spectral Projection 
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Copyright information

© Hebrew University 2004

Authors and Affiliations

  1. 1.Laboratoire de mathématiquesUniversité Paris-SudOrsayFrance

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