... fxn−l1,xn−2k1Taixiang Sun1and Hongjian Xi21Department of Mathematics, College of Mathematics and Information Science, Guangxi University,Nanning 530004, Guangxi, China2Department of Mathematics, Guangxi ... 1},andf satisfies the following hypotheses:H1 f ∈ CE×E, 0,∞ with ainfu,v∈E×Efu, v∈E,whereE ∈{0,∞, 0,∞};H2 fu, v is decreasing in u and increasing in v;H3 there ... Recently,there has been a lot of interest in studying the global attractivity, the boundedness character,and the periodic nature of nonlinear difference equations e.g., see 1, 2 .In 3, Grove...