Results 1 to 10 of about 17,751 (116)

Schur multiplier operator and matrix inequalities [PDF]

open access: yesJournal of Mahani Mathematical Research, 2023
In this note we obtain a reverse version of the Haagerup Theorem. In particular, if $ A \in \mathbb{M}_{n}$ has a $ 2\times2- $ principal submatrix as $ \left[ \begin{array}{cc}1& \alpha \\\beta & 1\\\end{array}\right]$ with $ \beta \neq \bar{\alpha ...
Alemeh Sheikhhosseini
doaj   +1 more source

Iterated discrete Hardy-type inequalities with three weights for a class of matrix operators

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2023
Iterated Hardy-type inequalities are one of the main objects of current research on the theory of Hardy inequalities. These inequalities have become well-known after study boundedness properties of the multidimensional Hardy operator acting from the ...
N.S. Zhangabergenova, A.M. Temirhanova
doaj   +1 more source

On Several Matrix Kantorovich-Type Inequalities

open access: yesJournal of Inequalities and Applications, 2010
We present several matrix Kantorovich-type inequalities, which improve the results obtained in Liu and Neudecker (1996). Elementary methods suffice to prove the inequalities.
Kanmin Wang, Zhibing Liu, Linzhang Lu
doaj   +2 more sources

On Some Matrix Trace Inequalities

open access: yesJournal of Inequalities and Applications, 2010
We first present an inequality for the Frobenius norm of the Hadamard product of two any square matrices and positive semidefinite matrices. Then, we obtain a trace inequality for products of two positive semidefinite block matrices by using block ...
Ulukök Zübeyde   +1 more
doaj   +2 more sources

Asymptotic Stability of a Delay-Difference Control System of Hopfield Neural Networks via Matrix Inequalities and Applications

open access: yesWalailak Journal of Science and Technology, 2011
We have established a new sufficient condition for the asymptotic stability of a delay-difference control system of Hopfield neural networks in terms of certain matrix inequalities (based on a discrete analog of the Lyapunov second method).
Kreangkri RATCHAGIT
doaj   +1 more source

Best approximation of κ-random operator inequalities in matrix MB-algebras

open access: yesJournal of Inequalities and Applications, 2021
We introduce a class of stochastic matrix control functions and apply them to stabilize pseudo stochastic κ-random operator inequalities in matrix MB-algebras.
Masoumeh Madadi   +3 more
doaj   +1 more source

Asymptotic properties of solutions of Riccati matrix equations and inequalities for discrete symplectic systems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
In this paper we study the asymptotic properties of the distinguished solutions of Riccati matrix equations and inequalities for discrete symplectic systems.
Roman Simon Hilscher
doaj   +1 more source

Hardy-type inequalities for matrix operators

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2017
We establish necessary and sufficient conditions the validity of the discrete Hardy - type inequality (∑∞i=1(∑∞j=1ai,jfj)quiq)1/q ≤ (∑∞i=1 fipvip)1/p, f={fi}∞i=1≥0, with 0 < p ≤ q < ∞ and 0 < p ≤ 1, where the matrices (ai;j) is an arbitrary matrix and ...
S. Shaimardan, S. Shalgynbaeva
doaj   +1 more source

An Uncertain Sandwich Impulsive Control System with Impulsive Time Windows

open access: yesMathematics, 2022
In this paper, we formulate a new system, named the uncertain sandwich impulsive control system with impulsive time windows. The presented system shows that the linear entry matrix of the system is indeterminate.
Huafei Chen   +4 more
doaj   +1 more source

Decentralized Controller Design for Stochastic Gene Regulatory Networks [PDF]

open access: yesJournal of Electrical and Computer Engineering Innovations, 2019
Background and Objectives: Regulation of protein expression in cellular level are so challenging. In cellular scale, biochemical processes are intrinsically noisy and many convenient controllers aren’t physically implementable.Methods: In this paper, we ...
M. Mohammadian
doaj   +1 more source

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