Results 11 to 20 of about 3,687,370 (267)
Vector Inequalities for Powers of Some Operators in Hilbert Spaces [PDF]
, 2008 Vector inequalities for powers of some operators in Hilbert spaces with applications for operator norm, numerical radius, commutators and self-commutators are ...
Dragomir, Sever S
core +7 more sources
New Inequalities of the Kantorovich Type for Bounded Linear Operators in Hilbert Spaces [PDF]
, 2006 Some new inequalities of the Kantorovich type are established. They hold for larger classes of operators and subsets of complex numbers than considered before in the literature and provide refinements of the classical results in the case when the ...
Dragomir, Sever S
core +6 more sources
Some Inequalities for the Euclidean Operator Radius of Two Operators in Hilbert Spaces [PDF]
, 2006 Some sharp bounds for the Euclidean operator radius of two bounded linear operators in Hilbert spaces are given. Their connection with Kittaneh’s recent results which provide sharp upper and lower bounds for the numerical radius of linear operators ...
Dragomir, Sever S
core +7 more sources
Upper Bounds for the Euclidean Operator Radius and Applications [PDF]
, 2006 The main aim of the present paper is to establish various sharp upper bounds for the Euclidean operator radius of an n−tuple of bounded linear operators on a Hilbert space.
Dragomir, Sever S
core +6 more sources
Čebyšev's Type Inequalities for Functions of Selfadjoint Operators in Hilbert Spaces [PDF]
, 2008 Some inequalities for continuous synchronous (asynchronous) functions of selfadjoint linear operators in Hilbert spaces, under suitable assumptions for the involved operators, are ...
Dragomir, Sever S
core +7 more sources
Linear Matrix Inequality Approaches to Koopman Operator Approximation
CoRR, 2021 The regression problem associated with finding a matrix approximation of the Koopman operator from data is considered. The regression problem is formulated as a convex optimization problem subject to linear matrix inequality (LMI) constraints. Doing so allows for additional LMI constraints to be incorporated into the regression problem.
Steven Dahdah, James Richard Forbes
openaire +3 more sources
Spectral radius of S-essential spectra
Математичні 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
Further Inequalities for the Weighted Numerical Radius of Operators
Mathematics, 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
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Vallée-Poussin theorem for Hadamard fractional functional differential equations
Applied 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
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A Hilbert-Type Linear Operator with the norm and Its Applications
Journal of Inequalities and Applications, 2009 A Hilbert-type linear operator T:ℓϕp→ℓψp is defined. As for applications, a more precise operator inequality with the norm and its equivalent forms are deduced. Moreover, three equivalent reverses from them are given as
Wuyi Zhong
doaj +2 more sources