Absolute stability and absolute instability of control systems with several nonlinear nonstationary elements
Using the technique of Lyapunov functions conditions are found for absolute stability and instability of the time-dependent control system \[ \dot x(t)=Ax(t)+f_ 1(c^ T_ 1x(t),t)+...+f_ k(c^ T_ kx(t),t),\quad x(t)\in {\mathbb{R}}^ n. \]
scientific article; zbMATH DE number 3877026