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Our results are related to the previous existence results for a Cauchy problem with functional dependence [10, 11] because the existence theorems are proved by means of
In this paper we consider ordinary and functional differential equations with T -periodic right hand side and look at some conjectures on proving the existence of a..
Then we have the following fixed point theorem, given in Boyd and Wong [1], which is useful for proving the existence and uniqueness theorems for nonlinear differential and
they applied the criteria to show the existence of periodic and almost periodic solutions for some partial functional differential equations with infinite delay and some
Krasnosel’ski˘ı fixed point theorem has been extensively used in differential and functional differential equations, by Burton in proving the existence of periodic solutions..
Raffoul, Existence of periodic and positive peri- odic solutions in totally nonlinear delay differential equations (preprint).
Gao: Existence of nontrivial nonnegative periodic so- lutions for a class of doubly degenerate parabolic equation with nonlocal terms. Yamada: Periodic solutions of certain
In this paper, we prove the existence of nontrivial nonnegative classical time periodic solutions to the viscous diffusion equation with strongly nonlinear periodic sources..
