设X=[0,1),f:X→X是连续自映射.指出:如果f是逐点链回归的(也就是说,X中的每一点在f下是链回归的),那么,若Fix(f)是连通的,则f是恒等映射;若Fix(f)是不连通的,则f含湍流.
Let X = [-0,1),f.X → X be a continuous map. It is showed that if fis pointwise chain recurrent (that is, every point of X is chain recurrent under f), then f is identity if Fix(f) is connected; f is turbulent if Fix(f) is disconnected.