A Refinement of von Neumann-Heinz Theorem and Related Inequalities

被引：0
|
作者：
Gevorgyan, L. Z. [1 ]
机构：
[1] State Engn Univ Armenia, Yerevan, Armenia
来源：
JOURNAL OF CONTEMPORARY MATHEMATICAL ANALYSIS-ARMENIAN ACADEMY OF SCIENCES | 2008年 / 43卷 / 02期
关键词：
Von Neumann's inequality; numerical range;
D O I：
10.3103/S1068362308020027
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
The paper gives a quantitative refinement of von Neumann's theorem with some relevant inequalities permitting to estimate from below the distance between the origin of the coordinate system and the so-called normalized numerical range of an operator acting in the Hilbert space.
引用
收藏
页码：79 / 84
页数：6
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