Anti-synchronization of four scroll attractor with fully unknown parameters

We have observed the anti-synchronization phenomena in coupled identical chaotic dynamical systems. Anti-synchronization can be characterized by the vanishing of the sum of relevant variables. Anti-synchronization problem of coupled identical chaotic dynamical systems with fully unknown parameters is analyzed. This technique is applied to achieve anti-synchronization of four-scroll atractor. Numerical simulations are provided to verify the effectiveness of the proposed method.