Positive periodic solutions of periodic neutral Lotka-Volterra system

摘要

By using a fixed point theorem of strict-set-contraction, some criteria are established for the existence of positive periodic solutions of the following periodic neutral Lotka-Volterra system with distributed delays [GRAPHICS] where a(i),b(ij),c(ij) epsilon C(R, R+) (i, j= 1,2,...,n) are omega-periodic functions, T-ij, (T) over cap (ij) epsilon (0,infinity) (i, j= 1,2,...,n) and K-ij, (K) over cap (ij) epsilon (R, R+) satisfying (0)integral(-Tij) K-ij(theta)d theta = 1, 0 integral(-(T) over cap ij)(theta)d theta = 1, i,j= 1,2,...,n. (C) 2006 Elsevier Ltd. All rights reserved.