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Journal of Function Spaces
Volume 2014, Article ID 815170, 6 pages
Research Article

Existence of Positive Solutions for Second-Order Neumann Difference System

Department of Mathematics, Northwest Normal University, Lanzhou 730070, China

Received 30 October 2013; Accepted 20 December 2013; Published 8 January 2014

Academic Editor: Gen-Qi Xu

Copyright © 2014 Yanqiong Lu and Ruyun Ma. 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.


This paper studies a class of Neumann difference system which is not cooperative but its linear part is and this makes it possible to establish existence and nonexistence results for nonnegative solutions of the system in terms of the principal eigenvalue of the corresponding linearized system.