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A geometric interpretation of maximal Lyapunov exponent based on deviation curvature

Course of Mechanical Engineering Systems, School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan

E-mail Address: yajima@cc.utsunomiya-u.ac.jp

Corresponding author.

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and

Shintaro Nakase

Department of Mechanical and Intelligent Engineering, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585, Japan

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https://doi.org/10.1142/S0219887821500924Cited by:3 (Source: Crossref)

Abstract

In this study, we discuss a relationship between the behavior of nonlinear dynamical systems and geometry of a system of second-order differential equations based on the Jacobi stability analysis. We consider how a maximal Lyapunov exponent is related to the geometric quantities. As a result of a theoretical investigation, the maximal Lyapunov exponent can be represented by a nonlinear connection and a deviation curvature. Thus, this means that the Jacobi stability given by the sign of the deviation curvature affects the change of the maximal Lyapunov exponent. Additionally, for an equation of nonlinear pendulum, we numerically confirm the theoretical results. We observe that a change of the maximal Lyapunov exponent is related to a change of an average deviation curvature. These results indicate that the deviation curvature and Jacobi stability are essential for considering the change of maximal Lyapunov exponent.

Keywords:

AMSC: 34A26, 34D08, 53Z05

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