通过递增函数的矩阵奇异值不等式

IF 1.5 3区 数学 Q1 MATHEMATICS
Wasim Audeh, Anwar Al-Boustanji, Manal Al-Labadi, Raja’a Al-Naimi
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引用次数: 0

摘要

让 A, B, X 和 Y 是 $n\times n$ 复数矩阵,使得 A 是自相关的,$B\geq 0$ , $pm A\leq B$ , $\max ( \Vert X \Vert ^{2}, \Vert Y \Vert ^{2} ) \leq 1$ , 并让 f 是一个在 $[ 0,\infty ) $ 上满足 $f(0)=0$ 的非负递增凸函数。Then $$ 2s_{j}\bigl(f \bigl\vert XAY^{\ast } \bigr\vert \bigr) \bigr)\leq \max \bigl\{ \Vert X \Vert ^{2}, \Vert Y \Vert ^{2}.\s_{j}\bigl(f(B+A)\oplus f(B-A)\bigr) $$ for $j=1,2,\ldots,n$ 。这个奇异值不等式扩展了 Audeh 和 Kittaneh 的不等式。此外,还给出了矩阵奇异值不等式和规范不等式的几种一般化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Singular value inequalities of matrices via increasing functions
Let A, B, X, and Y be $n\times n$ complex matrices such that A is self-adjoint, $B\geq 0$ , $\pm A\leq B$ , $\max ( \Vert X \Vert ^{2}, \Vert Y \Vert ^{2} ) \leq 1$ , and let f be a nonnegative increasing convex function on $[ 0,\infty ) $ satisfying $f(0)=0$ . Then $$ 2s_{j}\bigl(f \bigl( \bigl\vert XAY^{\ast } \bigr\vert \bigr) \bigr)\leq \max \bigl\{ \Vert X \Vert ^{2}, \Vert Y \Vert ^{2} \bigr\} s_{j}\bigl(f(B+A)\oplus f(B-A)\bigr) $$ for $j=1,2,\ldots,n$ . This singular value inequality extends an inequality of Audeh and Kittaneh. Several generalizations for singular value and norm inequalities of matrices are also given.
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来源期刊
自引率
6.20%
发文量
136
期刊介绍: The aim of this journal is to provide a multi-disciplinary forum of discussion in mathematics and its applications in which the essentiality of inequalities is highlighted. This Journal accepts high quality articles containing original research results and survey articles of exceptional merit. Subject matters should be strongly related to inequalities, such as, but not restricted to, the following: inequalities in analysis, inequalities in approximation theory, inequalities in combinatorics, inequalities in economics, inequalities in geometry, inequalities in mechanics, inequalities in optimization, inequalities in stochastic analysis and applications.
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