摘要
主要证明了如下两个结果 :设X =lim← {Xσ,πσρ,Σ}并且每个πσ 是开满映射 ,(1)如果X是 |Σ| 仿紧的且每个Χσ 是正规弱 θ 可加的 ,则X是正规弱 θ 可加的 ;(2 )如果X是遗传|Σ| 仿紧的且每个Xσ 是遗传正规的遗传弱 θ 可加空间 ,则X是遗传正规的遗传弱 θ 可加空间 .
The author proved the following results: Let X= lim ←{X σ,π σ ρ,Σ} and every π σ be open and onto mapping,(1) if X is |Σ| paracompact and every X σ is normal and weakly refinable, then X is normal and weakly refinable; (2) if X is hereditarily |Σ| paracompact and every X σ is hereditarily normal and hereditarily weakly refinable, then X is hereditarily normal and hereditarily weakly refinable.
出处
《四川大学学报(自然科学版)》
CAS
CSCD
北大核心
2000年第4期521-525,共5页
Journal of Sichuan University(Natural Science Edition)
基金
四川省自然科学基金!(重点基金 )资助课题
关键词
逆极限
正规弱-可加
遗传正规
弱θ^--可加空间
inverse limit
|Σ| paracompact
normal weakly refinable
hereditarily normal
hereditarily weakly refinable