Boundary Value Problems
Volume 2010 (2010), Article ID 973731, 22 pages
Research Article

Solutions and Green's Functions for Boundary Value Problems of Second-Order Four-Point Functional Difference Equations

Institute of Systems Science and Mathematics, Naval Aeronautical and Astronautical University, Yantai, Shandong 264001, China

Received 23 April 2010; Accepted 11 July 2010

Academic Editor: Irena Rachůnková

Copyright © 2010 Yang Shujie and Shi Bao. 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 consider the Green's functions and the existence of positive solutions for a second-order functional difference equation with four-point boundary conditions.