摘要
文章借助于Junnila技巧研究序列式次中紧空间。利用σ-闭包保持闭加细刻画了序列式次中紧空间,作为应用,闭序列覆盖映射保持序列次中紧性。
The sequential submesocompact spaces is studied by use of the technique invented by H. J. K. Junnila. The sequential submesocompactness is characterized by σ-clousure-preserving closed refinement. As an application, it is proved that the closed sequence-covering mappings preserve sequnential submesocompactness.
出处
《四川理工学院学报（自然科学版）》
CAS
2009年第1期11-14,共4页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
序列次中紧
σ-闭包保持闭加细
序列覆盖映射
sequential submesocompactness
o--clousure-preserving closed refinements
sequence-covering mappings
