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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Publication Details

Journal
Journal of Inequalities and Applications
Published
2024-09-03
DOI
https://doi.org/10.1186/s13660-024-03193-3
Citations
3
Primary Topic
Matrix Theory and Algorithms
Type
article
Field-Weighted Citation Impact
1.08

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article

Singular value inequalities of matrices via increasing functions

Wasim Audeh, Manal Al-Labadi, Raja’a Al-Naimi, Anwar Al-Boustanji
3 citations
Journal of Inequalities and Applications
Matrix Theory and Algorithms
1.08
article

Singular value inequalities of matrices via increasing functions

Wasim Audeh, Manal Al-Labadi, Raja’a Al-Naimi, Anwar Al-Boustanji
article en
3 citations

Abstract

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.

Journal of Inequalities and ApplicationsVol. 2024(1)
German Jordanian University (JO), Petra University (JO)
University of Petra
Reduced inequalities
Openalex Percentile: Top 20%
Matrix Theory and Algorithms
1.08
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