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New method estimates Lyapunov exponents from short trajectory data

Researchers have developed a novel method for estimating negative largest Lyapunov exponents from short trajectory ensembles without relying on governing equations or analytical Jacobians. This period-aware forecast-error contraction procedure synchronizes forecasts with the detected orbit period and requires a stable consensus across transient lengths to accept candidate slopes. The technique was tested on the logistic map, successfully recovering 92% of negative-exponent parameter values with a mean absolute error of 0.0253, and on a two-dimensional map, achieving mean absolute errors between 0.00879 and 0.01145. AI

IMPACT This research could advance the understanding and prediction of complex dynamical systems, potentially impacting fields that rely on analyzing time-series data.

RANK_REASON Academic paper detailing a new scientific method. [lever_c_demoted from research: ic=1 ai=0.4]

Read on arXiv cs.LG →

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New method estimates Lyapunov exponents from short trajectory data

COVERAGE [1]

  1. arXiv cs.LG TIER_1 English(EN) · Andrei Velichko, N'Gbo N'Gbo, Viet-Thanh Pham ·

    Equation-Free Period-Aware Forecast-Error Contraction for Estimating Negative Largest Lyapunov Exponents from Short Trajectory Ensembles

    arXiv:2608.05522v1 Announce Type: cross Abstract: Estimating positive largest Lyapunov exponents from data is comparatively natural because neighboring trajectories separate, whereas stable dynamics require resolving contraction before measurement noise or finite precision erases…