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- W4387356016 abstract "The Toda-Brumer-Duff (TBD) is an analytical criterion for estimating the local exponential rate of divergence between nearby trajectories in dynamical systems, and it is employed as a test for assessing the existence of chaos therein. It is fairly simple, intuitive, and works well in several situations, hence gained quite a wide popularity, yet it is known to be not rigorous since predicts ``false positives'', i.e., flags as chaotic systems that are instead regular. We revisit here the TBD criterion in order to understand the causes of its failures, and pinpoint that the problem with it is due to two reasons: (a) the TBD criterion does not constrain the trajectories to lie on the same energy hypersurface; (b) it does not distinguish between the divergence of trajectories along or perpendicularly to the direction of the flow, the former being irrelevant for assessing the presence of chaos. We show how both points can be incorporated within the TBD framework, yielding an amended criterion which, when applied to reference cases, interprets correctly the kind of dynamics observed. However, since must rely upon the knowledge of actual trajectories, it cannot be employed as a shortcut with respect to the numerical integration of the equations of motion." @default.
- W4387356016 created "2023-10-05" @default.
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- W4387356016 date "2023-10-03" @default.
- W4387356016 modified "2023-10-06" @default.
- W4387356016 title "Revisiting the Toda-Brumer-Duff criterion for order-chaos transition in dynamical systems" @default.
- W4387356016 doi "https://doi.org/10.48550/arxiv.2310.01915" @default.
- W4387356016 hasPublicationYear "2023" @default.
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