Comment on ``Proposed central limit behavior in deterministic dynamical systems''

Details Comment on ``Proposed central limit behavior in deterministic dynamical systems'' Comment on ``Proposed central limit behavior in deterministic dynamical systems''

2009-06-06

arxiv.org/abs/0906.1262v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures

Scientific paper

In a recent Brief Report [Phys. Rev. E 79 (2009) 057201], Grassberger re-investigates probability densities of sums of iterates of the logistic map near the critical point and claims that his simulation results are inconsistent with previous results obtained by us [U. Tirnakli et al., Phys. Rev. E 75 (2007) 040106(R) and Phys Rev. E 79 (2009) 056209]. In this comment we point out several errors in Grassberger's paper. We clarify that Grassberger's numerical simulations were mainly performed in a parameter region that was explicitly excluded in our 2009 paper and that his number of iterations is insufficient for the region chosen. We also show that, contrary to what is claimed by the author, (i) Levy distributions are irrelevant for this problem, and that (ii) the probability distributions of sums that focus on transients are unlikely to be universal.

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