Anosov映射的一个等价条件

An Equivalent Condition for the Anosov Maps

证明了在紧致度量空间（Ｘ，ｄ）上，开自映射ｆ为具有常数ｃ＞０的Ａｎｏｓｏｖ映射。

On the compact metric space (X,d) , an open map f is an Anosov map with the constant c>0 if and only if the shift map σ f:X f→X f is an expansive map with POTP.