Periodic solutions for some partial functional differentialequations

[摘要] We study the existence of a periodic solution for some partial functional differential equations. We assumethat the linear part is nondensely defined and satisfies theHille-Yosida condition. In the nonhomogeneous linear case, weprove the existence of a periodic solution under the existence ofa bounded solution. In the nonlinear case, using a fixed-pointtheorem concerning set-valued maps, we establish the existence ofa periodic solution.

[学科分类] 应用数学