数学物理学报 ›› 1997, Vol. 17 ›› Issue (1): 105-110.

• 论文 • 上一篇    下一篇

基序列与有界线性算子

石峰   

  1. 武汉大学数学系 武汉 430072
  • 收稿日期:1995-04-12 修回日期:1996-03-18 出版日期:1997-02-26 发布日期:1997-02-26
  • 基金资助:
    国家自然科学基金资助项目

Bounded Linear Operator and Basic Sequences

Shi Feng   

  1. Dept. of Math., Wuhan University, Wuhan China 430072
  • Received:1995-04-12 Revised:1996-03-18 Online:1997-02-26 Published:1997-02-26

摘要: 该文用基序列来刻划Banach空间的几何性质,以及Banach空间中某些特殊算子的特征,得到一些好的结果.如有界线性算子T:XY是一个同构的充分必要条件是TX的每个具有基的子空间上的限制也是一个同构.对紧算子T:c0X也有众多的刻划.

关键词: 紧算子, 同构, 基序列

Abstract: In this paper,we characterize some geometrical properties and some special operators of Banach space by using basic sequence, and get some good results, such as:For a bounded linear operator T:XY,T is an isomorphism iff for every basic sequence {xn}1 in X, T|[xt]t=1 is an isomorphism; we also get some characters of compact operator T:c0X.

Key words: Compact operator, isomorphism, basic sequence