Simplest Chaotic Flow

dx/dt = y

dy/dt = z

dz/dt = -x + y2 - Az

2.0168 < A < 2.0577

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Discovered last year

Jerk function: j = da/dt

(cf: jounce, sprite, surge, snap)

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- Lorenz equations (7 variables, 2 nonlinearities)

- Rossler equations (7 variables, 1 nonlinearity)