Introduction

One common technique in solving nonlinear systems is to do a perturbation expansion about some small parameter. This note demonstrates that a conventional perturbation expansion might not be helpful when the system is chaotic because the perturbation solution could have no chaotic behavior.

• The Lorenz model
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So where did the chaos go ?

I am pretty sure I know what happened here, but I welcome your speculations. I will add your commentary to this page.