Introduction:
This section was organized with the goal of presenting an overview of recent activity in the area of Nonautonomous Dynamical Systems. Such systems are defined by differential or difference equations whose coefficients vary with time. The time dependence may exhibit a wide range of behavior, from periodic to stochastic: thus the coefficients may be, for instance, Bohr almost periodic functions, almost automorphic functions, or chain recurrent functions.
The invited speakers will discuss issues related to stability theory, bifurcation theory, control theory, and spectral theory of nonautonomous systems, as well as chaotic dynamics, numerical methods, and finite-time phenomena. Frequently, techniques which are successful when used to study autonomous systems cannot be applied to nonautonomous systems. So new concepts and techniques become necessary; many of these will be taken up in the course of the session. |