Advances in Difference Equations
Volume 2008 (2008), Article ID 816091, 11 pages
Almost-Periodic Weak Solutions of Second-Order Neutral Delay-Differential Equations with Piecewise Constant Argument
Department of Mathematics, Harbin Institute of Technology, Harbin 150001, China
Received 10 December 2007; Accepted 4 June 2008
Academic Editor: Ondrej Dosly
Copyright © 2008 Li Wang and Chuanyi Zhang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We investigate the existence of almost-periodic weak solutions of second-order neutral delay-differential equations with piecewise constant argument of the form , where denotes the
greatest integer function, is a real nonzero constant, and is almost periodic.