“…where 𝜛 i,j0 , 𝜛 i,j1 , and 𝜂 i,j0 are states of system (1), 𝛾 i,j0 > 0, 𝛾 i,j1 > 0, and Ξ i,j is a function. Then, if the initial deviations 𝜛 i,j0 − Ξ i,j (t) and 𝜛 i,j0 − Ξi,j (t) are bounded, the differential term Ξi,j (t) can be approximated by 𝜂 i,j0 .…”