关于分式线性函数的迭代周期性

The Iterative Periodicitg for the linear Fractional Functions

分式线性函数在逐次迭代的过程中往往表现出周期性，本文利用二阶循环级数讨论了由逐次迭代产生的分式线性函数序列，给出了这类序列具有周期性的充要条件．

：In this paper we discuss a class of Sequences of linear fractianal functions by use of 2 -order recurrence Sequences, give the necessary and Sufficient conditians of periodicity for this class of Sequences of functions.