Аннотация
In this paper, a new approach for constructing the Lyapunov function is considered. Lyapunov function is obtained as a vector function on the basis of the geometric interpretation of the Lyapunov's second method and, its antigradient is given by the velocity vector components (the right-hand side of the state equation) of the system. The stability area of a linear stationary control system is obtained in the simple inequalities form for the matrix elements of a closed system with indefinite parameters.