Abstract
In this talk, we give some issues on the regular feedback implementability in a behavioral framework. Recently, Lomadze has provided a necessary and sufficient condition for a given specification
with respect to a controllable system to be regularly feedback implementable and its parameterization by using mathematical model explicitly. However, it is desirable to guarantee that the system theoretic property is representation-free and it is also meaningful to be expanded to uncontrollable systems. From these background, we consider the regular feedback implementability with representation-free and with uncontrollable case from the theoretical points of view.