Separatrices and basins of stability from time series data

Details Separatrices and basins of stability from time series data Separatrices and basins of stability from time series data

2007-10-22

arxiv.org/abs/0710.4118v1

Nonlinear Sciences

Chaotic Dynamics

Scientific paper

An approach is presented for identifying separatrices in phase space generated from noisy time series data sets representative of measured experimental data. These separatrices are identified as ridges in the phase space distribution of finite-time Lyapunov exponents, i.e., Lagrangian coherent structures (LCS). As opposed to previous approaches, the LCS is identified using only trajectories since no analytical or data-defined vector field is available. The method is applied to a biological simulation in which the separatrix reveals a basin of stability. These results suggest that the method will be a fruitful approach to time series analysis, particularly in cases where a limited number of trajectories are available as might be encountered in experiments.

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