摘要
本文利用良序单调复盖、内部保持复盖、次ortho-紧及垫状加细等刻画了中紧性。其次,证明了空间是中紧的当且仅当它是中可膨胀的且具有性质b_o它们分别改进了文献[1]、[2]的相应结果。
In this paper mesocompactness is characterized in term of well-monotonecover, interior-preserving cover,suborthocompact and cushioned refinement,which improves the results of Guoshi Gao and Lisheng Wu.We prove that aspace is mnesocompact if and only if it is meso-expandable and has properly,which improves the result of JiGuang Jiang.
出处
《数学杂志》
CSCD
北大核心
1995年第2期142-146,共5页
Journal of Mathematics