一类n维自映射是2^∞型映射的充要条件

The necessary and sufficient condition for a class of n-dimensional self-mapping to be the 2^∞ one

若f是可降的n维自映射,则可以利用可降映射的特征和局部度量的稳定性,给出这类自映射是2∞型映射的一个充要条件。

If f is a reducible n-dimensional self-mapping, a necessary and sufficient condition for mapping to be the 2^∞ one can be given, with the features of mapping and locally metric stability.