Abstract: An approach was made to the theory and methods of nonlinear dynamic analyses of city systems or systems of cities and towns.The research procedure including three-steps was suggested as follows:1,General analyses of stability of systems;2.Fractal-dimension analyses based on selection of master variables of systems by means of constructing phase space and calculating correlation dimension;3.Modelling analyses based on reconstructing city dynamic system or dynamic system of cities and towns,carrying on system...