利用不动点定理研究了一类中立型差分方程正周期解的存在性.得到了方程正周期解存在的新的充分条件,推广和改进了有关文献的结果.
By using the fixed point theorem, some new sufficient conditions for positive periodic solutions of a class of neutral difference equations are obtained. The conclusions we have got here improve and generalize some known results.