Results 11 to 20 of about 3,117 (262)

Generalized Refinements of Reversed AM-GM Operator Inequalities for Positive Linear Maps

open access: yesAxioms, 2023
We shall present some more generalized and further refinements of reversed AM-GM operator inequalities for positive linear maps due to Xue’s and Ali’s publications.
Yonghui Ren
doaj   +1 more source

On weighted norm inequalities for positive linear operators [PDF]

open access: yesProceedings of the American Mathematical Society, 1989
Let T T be a positive linear operator defined for nonnegative functions on a σ \sigma -finite measure space ( X , m , μ ) \left ( {X,m,\mu } \right ) .
Kerman, R., Sawyer, E.
openaire   +1 more source

Improvements of operator reverse AM-GM inequality involving positive linear maps

open access: yesJournal of Inequalities and Applications, 2020
In this paper, we shall present some reverse arithmetic-geometric mean operator inequalities for unital positive linear maps. These inequalities improve some corresponding results due to Xue (J. Inequal. Appl. 2017:283, 2017).
Shazia Karim   +2 more
doaj   +1 more source

Spectral radius of S-essential spectra

open access: yesМатематичні Студії, 2020
In this paper, we study the spectral radius of some S-essential spectra of a bounded linear operator defined on a Banach space. More precisely, via the concept of measure of noncompactness,we show that for any two bounded linear operators $T$ and $S ...
C. Belabbaci
doaj   +1 more source

Bargmann-Type Inequality for Half-Linear Differential Operators

open access: yesJournal of Inequalities and Applications, 2009
By means of the Riccati technique, the authors obtain a Bargmann-type necessary condition for the existence of a nontrivial solution of the following perturbed half-linear Euler differential equation with at least \((n+1)\) zero points in \((0,\infty )\): \[ (\Phi(x^{\prime}))^{\prime}+[\gamma/t^{p}+c(t)]\Phi(x)=0, \] where \(\Phi (x):=|x|^{p - 2}x, p ...
Ondřej Došlý   +1 more
openaire   +5 more sources

General Weighted Opial Inequalities for Linear Differential Operators

open access: yesJournal of Mathematical Analysis and Applications, 1999
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Anastassiou, George A., Pečarić, J.
openaire   +4 more sources

Vallée-Poussin theorem for Hadamard fractional functional differential equations

open access: yesApplied Mathematics in Science and Engineering, 2023
We propose necessary and sufficient conditions for the negativity of the two-point boundary value problem in the form of the Vallée-Poussin theorem about differential inequalities for the Hadamard fractional functional differential problem \[ \begin ...
Martin Bohner   +4 more
doaj   +1 more source

Further Inequalities for the Weighted Numerical Radius of Operators

open access: yesMathematics, 2022
This paper deals with the so-called A-numerical radius associated with a positive (semi-definite) bounded linear operator A acting on a complex Hilbert space H. Several new inequalities involving this concept are established.
Najla Altwaijry   +2 more
doaj   +1 more source

Some generalizations of operator inequalities for positive linear maps

open access: yesJournal of Inequalities and Applications, 2016
In this paper, we generalize some operator inequalities for positive linear maps due to Lin (Stud. Math. 215:187-194, 2013) and Zhang (Banach J. Math. Anal. 9:166-172, 2015).
Jianming Xue, Xingkai Hu
doaj   +1 more source

Certain integral inequalities involving tensor products, positive linear maps, and operator means

open access: yesJournal of Inequalities and Applications, 2016
We present a number of integral inequalities involving tensor products of continuous fields of bounded linear operators, positive linear maps, and operator means.
Pattrawut Chansangiam
doaj   +1 more source

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