Electronic Journal of Differential Equations,
Vol. 2013 (2013), No. 157, pp. 1-13.

Title: Existence of positive almost periodic solutions for
       delay Lotka-Volterra cooperative systems
        
Authors: Kaihong Zhao (Kunming Univ. of Science and Tech., Yunnan, China)
         Juqing Liu   (Yuxi Normal Univ., Yunnan, China)

Abstract:
 In this article, we study a Lotka-Volterra cooperative system of equations
 with time-varying  delays and  distributed delays.
 By using Mawhin's continuation theorem of coincidence degree theory,
 we obtain sufficient conditions for the existence of positive almost periodic
 solutions. Also we present an example to illustrate our results.

Submitted December 4, 2012. Published July 08, 2013.
Math Subject Classifications: 34K14, 92D25.
Key Words: Lotka-Volterra cooperative system; almost-periodic solution; 
           coincidence  degree; delay equation.