一类n维自映射是2∞型映射的又一充要条件  

Another necessary and sufficient conditions for a class of n-dimensional self-mapping with its square to be of type 2∞

作　　者：张荣[1] 

机构地区：[1]重庆师范大学数学与计算机科学学院,重庆400047

出　　处：《长春工程学院学报（自然科学版）》2007年第1期75-77,共3页Journal of Changchun Institute of Technology：Natural Sciences Edition

基　　金：重庆市教委科学研究基金资助项目(05JWSK054)

摘　　要：若f是可降的n维自映射,则可利用可降映射的特征,给出这类n维自映射是2∞型映射的又一充要条件,R(f)/R(f)为可数集。If is a n-dimensional descendible continuous self-mapping, the necessary and sufficient conditions are given to f which is of n-dimensional self-mapping with its square to be of type 2∞ by using the feature of descendible mapping,as well as itsRf\R(f) being countable.

关 键 词：2∞型映射 可降映射 回归点集 闭包 

分 类 号：O177.2[理学—数学]