Results 31 to 40 of about 921,412 (275)

On Inequalities for Differential Operators [PDF]

open access: yesProceedings of the American Mathematical Society, 1958
In this paper we study the following problem: Given that certain functionals of u u and its derivatives belong to given L ...
openaire   +1 more source

An operator inequality related to Jensen’s inequality [PDF]

open access: yesProceedings of the American Mathematical Society, 2001
For bounded non-negative operators A A and
openaire   +2 more sources

An operator inequality

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1984
An inequality is proved in abstract separable Hilbert space H where A and B are bounded self-adjoint positive operators defined in H such that R(A)=R(B) and R(A) is closed.
P. D. Siafarikas
doaj   +1 more source

Converses of the Cauchy-Schwartz Inequality in the C*-framework [PDF]

open access: yes, 2000
In this paper, we present several multiplicative and additive converses of the Cauchy-Schwarz inequality in the framework of C*−algebra theory. Our results complement those obtained by M. Fujii, T.
Niculescu, Constantin P
core   +6 more sources

INEQUALITIES CONCERNING B-OPERATORS

open access: yesIssues of Analysis, 2016
Summary: Let \(\mathcal{P}_{n}\) be the class of polynomials of degree at most \(n\). Rahman introduced the class \(\mathcal {B}_{n}\) of operators \(B\) that map \(\mathcal {P}_{n}\) into itself. In this paper we prove some results concerning such operators and thereby obtain generalizations of some well known polynomial inequalities.
WALI S.L., SHAH W.M., LIMAN A.
openaire   +3 more sources

Generalized Gram–Hadamard inequality [PDF]

open access: yes, 2010
We generalize the classical Gram determinant inequality. Our generalization follows from the boundedness of the antisymmetric tensor product operator.
Constantinescu, Florin (Prof. Dr.)   +1 more
core   +1 more source

New Refinement of the Operator Kantorovich Inequality

open access: yesMathematics, 2019
We focus on the improvement of operator Kantorovich type inequalities. Among the consequences, we improve the main result of the paper [H.R. Moradi, I.H. Gümüş, Z.
Hamid Reza Moradi   +2 more
doaj   +1 more source

Oscillatory and spectral properties of fourth-order differential operator and weighted differential inequality with boundary conditions

open access: yesBoundary Value Problems, 2022
In the paper, we study the oscillatory and spectral properties of a fourth-order differential operator. These properties are established based on the validity of some weighted second-order differential inequality, where the inequality’s weights are the ...
Askar Baiarystanov   +2 more
doaj   +1 more source

An operator inequality

open access: yesLinear Algebra and its Applications, 1990
Authors have proved some results on an operator inequality in Hilbert space.
Corach, G., Porta, H., Recht, L.
openaire   +1 more source

Operator valued Dirichlet problem in the plane [PDF]

open access: yes, 2012
We consider an operator valued Dirichlet problem for harmonic mappings and prove the existence of a Perron-like solution. To formulate the Perron’s construction we make use of Olson’s notion of spectral order.
Göğüş, Nihat Gökhan
core   +3 more sources

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