Properties of solutions to second order evolution control systems. II

We continue the research of the first part of the article. We mainly study codensity for the set of admissible “trajectory-control” pairs of a system with nonconvex constraints in the set of admissible “trajectory-control” pairs of the system with convexified constraints. We state necessary and sufficient conditions for the set of admissible “trajectory-control” pairs of a system with nonconvex constraints to be closed in the corresponding function spaces. Using an example of a control hyperbolic system, we give an interpretation of the abstract results obtained. As application we consider the minimization problem for an integral functional on solutions of a control system.