数学物理学报 ›› 2010, Vol. 30 ›› Issue (3): 644-648.

• 论文 • 上一篇    下一篇

C(Ω)} 空间上的光滑点刻画

王瑞东   

  1. 天津理工大学理学院 天津  |300191
  • 收稿日期:2008-06-20 修回日期:2010-01-15 出版日期:2010-05-25 发布日期:2010-05-25
  • 基金资助:

    国家自然科学基金(10871090)和高校博士点基金(20060055010)资助

The Smooth Point in C(Ω)

 WANG Rui-Dong   

  1. Science of College, Tianjin University of Technology, Tianjin 300191
  • Received:2008-06-20 Revised:2010-01-15 Online:2010-05-25 Published:2010-05-25
  • Supported by:

    国家自然科学基金(10871090)和高校博士点基金(20060055010)资助

摘要:

该文主要研究了C(Ω)型空间上的光滑点(即峰值函数)的存在性和稠密性, 其中Ω为紧 Hausdorff 空间.当Ω不可度量化时,给出了例子说明存在紧 Hausdorff 空间Ω1使得C1)空间上的光滑点在全空间稠密,并且给出了反方面的例子说明存在紧Hausdorff 空间Ω2使得C2)空间上的光滑点为空集.最后给出了C(Ω)型空间上的光滑点稠密的充要条件.

关键词: 光滑点, 峰值函数, C(Ω)空间

Abstract:

In this paper, we study the smooth point (peak function) in space of C(Ω), where Ω is compact Hausdorff space. We give an example to show that there exists compact Hausdorff space Ω1 such that the smooth point of C1) is dense in the whole space. And we give an counter example to show that there exists compact Hausdorff space Ω2 such that the smooth point of C2) is empty. Finally we give an intrinsic character of the smooth point of space C(Ω) is dense in the whole space.

Key words: Smooth point, Peak function, C(Ω) space

中图分类号: 

  • 46B20