supported by Trans-Century Taining Programme Foundation for the Talents by the State Education Conmittee;the Doctoral Foundation of Ministry of Educatin of China(No.20020532014).
This paper is to solve several problems on the global attractivity of the zero solution of the nonautonomous difference equation $x_{n + 1} - x_n + P_n x_{n - k_n } = 0,n \in \mathbb{Z} (0)$ , where P n is a sequence ...