摘要
设A■X,v为X上的拓扑,用A_v^0、A_v^-、(A_v)_0、(A_v)_-、A’_v分别记A在(X,v)中的内部、闭包、半内部、半闭包和补集。用η_v、ζ_v、ζ_v分别记(X,v)中的半开集族、无处稠密集族和稠密集族。当v=u时,略去上述记号中的足码v。
In this paper, the regular-semiopen and regular-semiclosed sets intopological space are introduced. Based on this, the structure or semihomeomorphismspace classes is discussed. then almost-semiirresolute and almost-semiirresolute-open(closed) mappings are given.
出处
《纯粹数学与应用数学》
CSCD
1991年第1期97-99,共3页
Pure and Applied Mathematics
关键词
正则半开集
半同胚空间类
正则半闭集
拓扑空间
semiopen sets
regular open sets
regular-semiopen sets
semihomeomorphism space classes
almost-semiirrsolute mappings
almost-semiirresolute-open mappings
