Abstract
This work investigates the existence of periodic solutions for the following partial neutral nonautonomous functional differential equation (1) where the linear operator A is not necessarily densely defined and satisfies the Hille–Yosida condition, , , is a family of bounded linear operators from into X and the nonlinear delayed part F satisfies some locally Lipschitz conditions. More precisely, we study the Massera problem for the existence of a τ-periodic solution of (1). Then, we prove for , in the dichotomic case, the existence, uniqueness and conditional stability of the periodic solution. Finally, our results are illustrated by an application.
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