Nonlinear Dynamics and Chaos
Nonlinear Dynamics and Chaos
2nd Edition
ISBN: 9780813349107
Author: Steven H. Strogatz
Publisher: PERSEUS D
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Chapter 7.5, Problem 1E
Interpretation Introduction

Interpretation:

To show that the positive branch of the cubic nullcline begins at xA = 1 and ends at xB = 1 for the van der Pol oscillator with μ >>1.

Concept Introduction:

Nullclines are a set of points in the phase plane where x˙ = y˙ = 0.

The set of points in a phase plane where x˙ = 0 is known as x-nullclines. The geometrical meaning of x-nullclines is the points where the vectors are pointed either straight upward or downward.

The set of points in a phase plane where y˙ = 0 is known as y-nullclines. The geometrical meaning of y-nullclines is the points where the vectors are pointed horizontally.

To find the equation for x-nullclines and y-nullclines, put x˙ = y˙ = 0 and solve for

x = f(x,y) and y = f(x,y).

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