In this work, we study the existence of periodic solutions for some nonlinear partial functional differential equation of neutral type. We assume that the linear part is nondensely defined and satisfies the Hille-Yosida condition. The delayed part is assumed to be omega-periodic with respect to the first argument. Using a fixed point theorem for multivalued mapping, some sufficient conditions are given to prove the existence of periodic solutions.
机构:
College of Mathematics & Statistics,Nanjing University of Information Science & TechnologyCollege of Mathematics & Statistics,Nanjing University of Information Science & Technology