Results 11 to 20 of about 237,012 (170)

On the positive linear set valued maps [PDF]

open access: yesMiskolc Mathematical Notes, 2013
In this paper positive linear set valued maps defined on the cone are studied. The representation theorem for positive linear set valued maps is given and Lipschitz continuity of these maps is proved. The estimations of upper and lower norms of the positive linear set valued maps are obtained.
Huseyin, Anar, Huseyin, Nesir
openaire   +2 more sources

Some complementary inequalities to Jensen’s operator inequality

open access: yesJournal of Inequalities and Applications, 2018
In this paper, we study some complementary inequalities to Jensen’s inequality for self-adjoint operators, unital positive linear mappings, and real valued twice differentiable functions.
Jadranka Mićić   +2 more
doaj   +1 more source

Positive solutions for nonlocal problems of nonlinear (p,q)- difference equations

open access: yesJournal of Hebei University of Science and Technology, 2021
In order to improve the basic theory of boundary value problems for nonlinear quantum difference equations,in this paper,we study the solvability of nonlocal problems for second order three-point nonlinear (p,q)-difference equations.Firstly,the Green ...
Changlong YU   +3 more
doaj   +1 more source

Pinchings and positive linear maps

open access: yesJournal of Functional Analysis, 2016
We employ the pinching theorem, ensuring that some operators A admit any sequence of contractions as an operator diagonal of A, to deduce/improve two recent theorems of Kennedy-Skoufranis and Loreaux-Weiss for conditional expectations onto a masa in the algebra of operators on a Hilbert space. We also get a few results for sums in a unitary orbit.
Bourin, Jean-Christophe, Lee, Eun-Young
openaire   +3 more sources

Spatial rainbows and catastrophes in transmission of protons through electrostatic hexapole lens [PDF]

open access: yesNuclear Technology and Radiation Protection, 2018
This work reports on the spatial rainbows occurring in transmission of 10 keV protons through hexapole lens. Positive potentials of the lens electrodes are set to be 0.9, 2, and 5 kV.
Telečki Igor N.   +4 more
doaj   +1 more source

Extreme n-positive linear maps [PDF]

open access: yesProceedings of the Edinburgh Mathematical Society, 1993
In this article we prove that if a completely positive linear map Φ of a unital C*-algebra A into another B with only finite dimensional irreducible representations is pure, then we have NΦ = Φker + kerΦ, where NΦ={x∈A|Φ(x) = 0}, Φker = {x∈A|Φ(x*x) = 0}, and kerΦ={x∈A|Φ(xx*) = 0}.
openaire   +1 more source

Complementing canonical fMRI with functional Quantitative Susceptibility Mapping (fQSM) in modern neuroimaging research

open access: yesNeuroImage, 2021
Functional Quantitative Susceptibility Mapping (fQSM) allows for the quantitative measurement of time-varying magnetic susceptibility across cortical and subcortical brain structures with a potentially higher spatial specificity than conventional fMRI ...
Marta Lancione   +6 more
doaj   +1 more source

Positive linear maps on normal matrices [PDF]

open access: yesInternational Journal of Mathematics, 2018
For a positive linear map [Formula: see text] and a normal matrix [Formula: see text], we show that [Formula: see text] is bounded by some simple linear combinations in the unitary orbit of [Formula: see text]. Several elegant sharp inequalities are derived, for instance for the Schur product of two normal matrices [Formula: see text], [Formula: see ...
Jean-Christophe Bourin, Eun-Young Lee
openaire   +3 more sources

More inequalities for positive linear maps [PDF]

open access: yesJournal of Mathematical Inequalities, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sharma, Rajesh, Thakur, A.
openaire   +2 more sources

The General Hybrid Approximation Methods for Nonexpansive Mappings in Banach Spaces

open access: yesAbstract and Applied Analysis, 2011
We introduce two general hybrid iterative approximation methods (one implicit and one explicit) for finding a fixed point of a nonexpansive mapping which solving the variational inequality generated by two strongly positive bounded linear operators ...
Rabian Wangkeeree
doaj   +1 more source

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