摘要
研究σ-空间(σ=O∪I)上连续自映射的非游荡集的拓扑结构,证明了孤立的周期点都是孤立的非游荡点;具有无限轨道的非游荡点集的聚点都是周期点的二阶聚点;不在周期点闭包中的ω-极限点都具有无限轨迹;ω-极限集的导集等于周期点集导集,以及非游荡集的二阶导集等于周期点集的二阶导集.
In this paper, the topological structure of non-wandering set of self-continuous map in σ-space is considered and we prove that any isolated periodic point is an isolated non-wandering point; each condensation of Ω(f) is the condensation point of two order of P (f) ; for any x∈W(f)-( P(f)^∪{a}) then x∈(f) ; the set of condensation poins of W(f) equals to the set of condensation points of P(f); the set of condensation points of two order of Ω(f) equals to the set of condensation points of two order of P(f).
出处
《安徽师范大学学报(自然科学版)》
CAS
2006年第3期217-219,共3页
Journal of Anhui Normal University(Natural Science)
基金
安徽省自然科学基金项目(2006kj249B)
安徽省教育厅青年科研基金项目(2005jq1153)
关键词
Σ-空间
周期点集
非游荡集
连续映射
σ-space
periodic points set
non-wandering set
continuous map