“…In this case, matrices P 1 , P 2 are chosen as identity matrices and Q 1 , Q 2 , R 1 , R 2 are taken as diag( − 1, − 1, − 1), which lead to antisynchronization. Hence, the initial conditions for the errors ( (131) E 11 , (213) E 21 , (322) E 31 ) and ( (123) E 12 , (212) E 22 , (331) E 32 ) are (2.7, 4, 6) and (12,11,13), respectively. Figures 8 and (9) show antisynchronization for (x 11 , (y 31 + z 11 )) and (x 21 , (y 11 + z 31 )), respectively.…”