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Q: Deriving inequality from a Lyapunov test of $x' = -x + y^3, \space y' = -y + ax^3$

RebellosExercise : Consider the dynamical system : $$x' = -x +y^3$$ $$y' = -y+ax^3$$ with $(x,y) \in \mathbb R^2$. Find the stationary point of the system and study their stability for every value of $a$. Show that if $a=1$ and $V(x,y) \leq R$, where $R>0$ is a constant and $V(x,y) = \frac{1}{2...

 

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