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Testing time series irreversibility using complex network methods
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The absence of time-reversal symmetry is a fundamental property of many nonlinear time series. Here, we propose a new set of statistical tests for time series irreversibility based on standard and horizontal visibility graphs. Specifically, we statistically compare the distributions of time-directed variants of the common complex network measures degree and local clustering coefficient. Our approach does not involve surrogate data and is applicable to relatively short time series. We demonstrate its performance for paradigmatic model systems with known time-reversal properties as well as for picking up signatures of nonlinearity in neuro-physiological data.
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Complex network approaches to nonlinear time series analysis
A Physics Reports review synthesizing recurrence, visibility, and transition network methods for extracting dynamical information from time series.
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