Nonlinear Dynamics and Chaos
Nonlinear Dynamics and Chaos
2nd Edition
ISBN: 9780813349107
Author: Steven H. Strogatz
Publisher: PERSEUS D
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Chapter 9.2, Problem 6E
Interpretation Introduction

Interpretation:

To show that the system x˙ = -vx + zy, y˙ = -vy + (z - a)x, z˙ = 1 - xy is dissipative. To show that the fixed points may be written in parametric form as x* = ±k, y* = ± k- 1, z* = vk2, where v(k2- k- 2) = a. To classify the fixed points.

Concept Introduction:

  • ➢ The divergence of a vector field is

    . f = xx˙ + yy˙ + zz˙

  • ➢ The fixed points are calculated as x˙ = 0, y˙ = 0, z˙ = 0

  • ➢ The Jacobian matrix is given by

    A = (x˙xx˙yx˙zy˙xy˙yy˙zz˙xz˙yz˙z)

  • ➢ The Eigen value λ can be calculated using the characteristic equation

    |(A - λI)| = 0

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