Fractional-order systems without equilibria: The first example of hyperchaos and its application to synchronization
Cafagna Donato†, Grassi Giuseppe
       
Hyperchaotic attractors of the fractional-order system without equilibrium points ( 16 ) with q = 0.96 and initial conditions (0.12, 0.12, 0.12, 0.12): (a) attractor in the ( x , w )-plane, (b) attractor in the ( z , w )-plane.