SECOND ORDER NECESSARY CONDITIONS FOR OPTIMAL CONTROL PROBLEMS OF EVOLUTION EQUATIONS INVOLVING FINAL POINT EQUALITY CONSTRAINTS

We establish some second order necessary conditions for optimal control problems of evolution equations involving final point equality and inequality constraints. Compared with the existing works, the main difference is due to the presence of end-point equality constraints. With such constraints, we cannot simply use the variational techniques since perturbations of a given control may be no longer admissible. We also cannot use the Ekeland's variational principle, which is a first order variational principle, to obtain second order necessary conditions. Instead, we combine some inverse mapping theorems on metric spaces and second order linearization of data to obtain our results.