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Duality in problems of control and observation for linear systems with aftereffect. (Russian. English summary) Zbl 0568.93038
A general class of neutral, nonstationary delay-differential systems with distributed delays is considered in this paper. Controllability- observability duality relations for this class of systems are established for different types of controllability and observability.
Reviewer: S.H.Żak

93C30 Control/observation systems governed by functional relations other than differential equations (such as hybrid and switching systems)
34K35 Control problems for functional-differential equations
93C05 Linear systems in control theory
39B52 Functional equations for functions with more general domains and/or ranges
49N15 Duality theory (optimization)
93B05 Controllability
93B07 Observability
93C99 Model systems in control theory