Ai. Alonso et al., Almost periodic type solutions of differential equations with piecewise constant argument via almost periodic type sequences, APPL MATH L, 13(2), 2000, pp. 131-137
The existence of almost periodic, asymptotically almost periodic, and pseud
o almost periodic solutions of differential equations with piecewise consta
nt argument is characterized in terms of almost periodic, asymptotically, a
nd pseudo almost periodic sequences. Thus Meisters's and Opial's theorems a
re extended. (C) 2000 Elsevier Science Led. All rights reserved.