自然科学版
陕西师范大学学报(自然科学版)
数学与计算机科学
严格收敛性与其他收敛性之间的关系
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郭丽敏,曹怀信
(陕西师范大学 数学与信息科学学院, 陕西 西安 710062)
郭丽敏,女,硕士研究生,研究方向为算子理论与小波分析.
摘要:
讨论了Hilbert C*-模上的有界线性算子网的严格收敛性与范数收敛性、强收敛性、弱收敛性之间的关系,证明了:严格收敛的算子网{Tλ}λ∈Λ的伴随算子网{T*λ}λ∈Λ也是严格收敛的; 严格收敛性是保持加法和数乘运算的; 两个严格收敛算子网之积仍是严格收敛的;严格收敛的算子网一定是强收敛的.
关键词:
希尔伯特 C*-模; C*-代数; 严格收敛性; 强收敛性; 弱收敛性; 范数收敛性
收稿日期:
2008-08-24
中图分类号:
O177.1
文献标识码:
A
文章编号:
1672-4291(2009)03-0009-04
基金项目:
国家自然科学基金资助项目(10571113,10871224)
Doi:
Relationships between strict convergence and other convergence
GUO Li-min, CAO Huai-xin
(College of Mathematics and Information Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
The relationships between the strict convergence and norm convergence, strong convergence as well as weak convergence of a net of bounded linear operators on a Hilbert C*-module are discussed. Following conclusions are proved: if a net {Tλ}λ∈Λ of bounded linear operators is strictly convergent, then the adjoint net {T*λ}λ∈Λ is also strictly convergent; the strict convergence of a net of bounded linear operators preserves the addition and multiplication of operations; a product of two strictly convergent nets of bounded linear operators is strictly convergent; a strictly convergent net of bounded linear operators is strongly convergent.
KeyWords:
Hilbert C*-module; C*-algebra; strict convergence; strong convergence; weak convergence; norm convergence