Differential Equations and Linear Algebra (4th Edition)

Published by Pearson
ISBN 10: 0-32196-467-5
ISBN 13: 978-0-32196-467-0

Chapter 9 - Systems of Differential Equations - 9.10 Nonlinear Systems - Problems - Page 662: 1

Answer

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Work Step by Step

We obtain: $2x+9y^2=0\\ y(3x-2)=0$ The critical point is $(0,0)$ The Jacobian of the system is: $J(x,y)=\begin{pmatrix} 3y& 3x-2\\ 2 & 18y \end{pmatrix}$ Substituting: $J(0,0)=\begin{pmatrix} 0 & -2\\ 2 & 0 \end{pmatrix}$ Then the eigenvalues are $\lambda_1=\pm 2i$. Consequently, the equilibrium point $(0,0)$ is a spiral point.
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