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

页码：79 / 84

页数：6

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