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ON THE MATHEMATICAL CLARIFICATION OF THE SNAP-BACK-REPELLER IN HIGH-DIMENSIONAL SYSTEMS AND CHAOS IN A DISCRETE NEURAL NETWORK MODEL

Research Center and Laboratory of Mathematics for Nonlinear Science, Department and Institute of Mathematics, Fudan University, Shanghai 200433, P. R. China

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JIONG RUAN

Research Center and Laboratory of Mathematics for Nonlinear Science, Department and Institute of Mathematics, Fudan University, Shanghai 200433, P. R. China

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, and

WEIRUI ZHAO

Research Center and Laboratory of Mathematics for Nonlinear Science, Department and Institute of Mathematics, Fudan University, Shanghai 200433, P. R. China

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https://doi.org/10.1142/S0218127402004966Cited by:26 (Source: Crossref)

Abstract

We investigate the differences among several definitions of the snap-back-repeller, which is always regarded as an inducement to produce chaos in nonlinear dynamical system. By analyzing the norms in different senses and the illustrative examples, we clarify why a snap-back-repeller in the neighborhood of the fixed point, where all eigenvalues of the corresponding variable Jacobian Matrix are absolutely larger than 1 in norm, might not imply chaos. Furthermore, we theoretically prove the existence of chaos in a discrete neural networks model in the sense of Marotto with some parameters of the systems entering some regions. And the following numerical simulations and corresponding calculation, as concrete examples, reinforce our theoretical proof.

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