Let X X(t) be the solution of the plane autonomous system x y y x (1 x2 )y that
Chapter 11, Problem 19(choose chapter or problem)
Let X=X(t) be the solution of the plane autonomous system
\(\begin{aligned}
&x^{\prime}=y \\
&y^{\prime}=-x-\left(1-x^{2}\right) y
\end{aligned}\)
that satisfies \(\mathbf{X}(0)=\left(x_{0}, y_{0}\right)\). Show that if \(x_{0}^{2}+y_{0}^{2}<1\), then \(\lim _{t \rightarrow \infty} \mathbf{X}(t)=(0,0)\). [Hint: Select r<1 with \(x_{0}^{2}+y_{0}^{2}<r^{2}\) and first show that the circular region R defined by \(x^{2}+y^{2} \leq r^{2}\) is an invariant region.]
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