Dfo flut LIIC TciEcu B} JICI 4uot 0-5404 origin is a stable star for the linearized system.
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6.3.12 (Polar coordinates) Using the identity θ = tan^(-1)(y/x), show that θ = (xy - yi)^(1/2). 6.3.13 (Another linear center that is actually a nonlinear spiral) Consider the system x = -Y-x', Y = x. Show that the origin is a spiral, although the linearization