Search Results - "Positive linear operators and order-bounded operators"

Order structure of order-to-topological continuous operator

Authors: Keleş, Gül Sinem Turan, Bahri Altin, Birol

Source: Turkish Journal of Mathematics. 49:173-184

Subject Terms: Banach lattices, order weakly compact operator, order convergent net, order-to-topology continuous operator, Positive linear operators and order-bounded operators, Linear operators on ordered spaces, vector lattice, Banach lattice, Ordered normed spaces

File Description: application/xml

Access URL: https://zbmath.org/8034444
https://doi.org/10.55730/1300-0098.3581

Quadratic programming with one quadratic constraint in Hilbert spaces

Authors: Santiago Gonzalez Zerbo Alejandra Maestripieri Francisco Martínez Pería

Source: Annals of Functional Analysis. 16

Subject Terms: quadratically constrained quadratic programming, Hilbert spaces, 0211 other engineering and technologies, HILBERT SPACES, 02 engineering and technology, Quadratic programming, Positive linear operators and order-bounded operators, 47N10, 90C20, 47B15, 47B65, Functional Analysis (math.FA), Mathematics - Functional Analysis, QUADRATICALLY CONSTRAINED QUADRATIC PROGRAMMING, Optimization and Control (math.OC), OPERATOR PENCILS, operator pencils, FOS: Mathematics, Hermitian and normal operators (spectral measures, functional calculus, etc.), Applications of operator theory in optimization, convex analysis, mathematical programming, economics, Mathematics - Optimization and Control

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Access URL: http://arxiv.org/abs/2303.05204
https://zbmath.org/8036320
https://doi.org/10.1007/s43034-025-00422-8
http://hdl.handle.net/11336/263259

Extended power difference means

Authors: Wada, Shuhei

Source: Acta Scientiarum Mathematicarum. 90:491-512

Subject Terms: Thompson metric, Operator means involving linear operators, shorted linear operators, etc, power difference mean, operator mean, Linear operator inequalities, logarithmic mean, Positive linear operators and order-bounded operators

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On a binary operation for positive operators

Authors: Shigeru Furuichi Hamid Reza Moradi Cristian Conde et al.

Source: Acta Scientiarum Mathematicarum. 90:649-665

Subject Terms: Mathematics - Functional Analysis, 47A63, 47A64, 47A30, 15A45, Operator means involving linear operators, shorted linear operators, etc, unitarily invariant norm, operator geometric mean, Unitary invariant norm, Operator geometric mean, Positive linear operators and order-bounded operators, Tsallis relative operator entropy, Equations involving linear operators, with operator unknowns

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Access URL: http://arxiv.org/abs/2402.06637
https://zbmath.org/7966720
https://doi.org/10.1007/s44146-023-00102-w
http://hdl.handle.net/11336/238286

On the A-spectrum for A-bounded operators on von-Neumann algebras: On the \(A\)-spectrum for \(A\)-bounded operators on von-Neumann algebras

Authors: H. Baklouti K. Difaoui M. Mabrouk

Source: Advances in Operator Theory. 9

Subject Terms: Mathematics - Functional Analysis, Mathematics - Operator Algebras, FOS: Mathematics, General (adjoints, conjugates, products, inverses, domains, ranges, etc.), Positive linear operators and order-bounded operators, Spectrum, resolvent, \(C^*\)-algebra, Operator Algebras (math.OA), positive operator, Linear operators in \(C^*\)- or von Neumann algebras, von Neumann algebra, spectrum, Functional Analysis (math.FA)

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Access URL: http://arxiv.org/abs/2306.00428
https://zbmath.org/7952254
https://doi.org/10.1007/s43036-024-00362-5

A note on the A-spectrum of A-bounded operators: A note on the \(a\)-spectrum of \(a\)-bounded operators

Authors: Baklouti, Hamadi Mabrouk, Mohammed

Source: Operators and Matrices. :599-611

Subject Terms: semi-inner product, Numerical range, numerical radius, General (adjoints, conjugates, products, inverses, domains, ranges, etc.), Linear operators in algebras, Positive linear operators and order-bounded operators, positive operator, spectrum

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Access URL: https://zbmath.org/7812140
https://doi.org/10.7153/oam-2023-17-40

Some Results on (A; (m, n))-Isosymmetric Operators on a Hilbert Space: Some results on \((A; (m, n))\)-isosymmetric operators on a Hilbert space

Authors: Rchid Rabaoui

Source: Bulletin of the Iranian Mathematical Society. 48:1619-1648

Subject Terms: nilpotent perturbation, Perturbation theory of linear operators, semi-Hilbert space, Positive linear operators and order-bounded operators, 01 natural sciences, Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.), spectrum, Linear symmetric and selfadjoint operators (unbounded), \((A, \((A, m)\)-symmetric operators, isosymmetric operators, (m, n))\)-isosymmetric operators, \((A, m)\)-isometric operators, 0101 mathematics

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Access URL: https://link.springer.com/article/10.1007/s41980-021-00602-x

The positive supercyclicity theorem

Authors: León Saavedra, F. Universidad de Cádiz

Contributors: León Saavedra, F. Universidad de Cádiz

Source: Dehesa. Repositorio Institucional de la Universidad de Extremadura
Universidad de Extremadura (UEX)

Subject Terms: Volterra operator, Research exposition (monographs, survey articles) pertaining to operator theory, Invariant subspaces of linear operators, 1202.01 Álgebra de Operadores, 1202 Análisis y Análisis Funcional, Cyclic vectors, hypercyclic and chaotic operators, Positive linear operators and order-bounded operators, supercyclic operators, Teorema de la superciclicidad positiva, positive operators, invariant subspaces, Positive supercyclicity theorem

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Access URL: http://hdl.handle.net/10662/17397
https://zbmath.org/2109257

Some A-spectral radius inequalities for A-bounded Hilbert space operators: Some \(A\)-spectral radius inequalities for \(A\)-bounded Hilbert space operators

Authors: Kais Feki

Source: Banach Journal of Mathematical Analysis. 16

Subject Terms: spectral radius, Primary 46C05, 47A12, Secondary 47B65, 47B15, 47B20, Positive linear operators and order-bounded operators, 01 natural sciences, Functional Analysis (math.FA), Mathematics - Functional Analysis, semi-inner product, Numerical range, numerical radius, FOS: Mathematics, Hermitian and normal operators (spectral measures, functional calculus, etc.), 0101 mathematics, Subnormal operators, hyponormal operators, etc, positive operator, numerical radius

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Access URL: http://arxiv.org/abs/2002.02905
https://zbmath.org/7525107
https://doi.org/10.1007/s43037-022-00185-7

Applications of Wigner’s theorem to positive maps preserving norm of operator products: Applications of Wigner's theorem to positive maps preserving norm of operator products

Authors: LI Jinxiu

Source: Frontiers of Mathematics in China. 1:582-588

Subject Terms: norm, operator algebra, Wigner's theorem, preserver problem, singular value, Transformers, preservers (linear operators on spaces of linear operators), Positive linear operators and order-bounded operators, 0101 mathematics, 01 natural sciences

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Access URL: https://zbmath.org/2157291
https://journal.hep.com.cn/fmc/EN/10.1007/s11464-006-0029-3
https://link.springer.com/article/10.1007/s11464-006-0029-3
https://academic.hep.com.cn/fmc/EN/abstract/abstract8008.shtml

Asymptotic behavior of Markov semigroups on preduals of von Neumann algebras

Authors: Eduard Yu. Emel'yanov Manfred Wolff

Source: Journal of Mathematical Analysis and Applications. 314:749-763

Subject Terms: predual, Applied Mathematics, Derivations, dissipations and positive semigroups in \(C^*\)-algebras, Markov operator, Positive linear operators and order-bounded operators, Mean ergodicity, Domination, 01 natural sciences, Linear operators in \(C^*\)- or von Neumann algebras, von Neumann algebra, Statistical stability, statistical stability, 0101 mathematics, Predual, Markov semigroups and applications to diffusion processes, Analysis, mean ergodicity, domination

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Access URL: https://core.ac.uk/display/82055680
https://avesis.metu.edu.tr/yayin/23ad6270-bef2-4740-8bc7-7ad44d595a6a/asymptotic-behavior-of-markov-semigroups-on-preduals-of-von-neumann-algebras
https://www.sciencedirect.com/science/article/abs/pii/S0022247X05003343
https://www.sciencedirect.com/science/article/pii/S0022247X05003343

Completely bounded homomorphisms of the Fourier algebras

Authors: Monica Ilie Nico Spronk

Source: Journal of Functional Analysis. 225:480-499

Subject Terms: Fourier–Stieltjes algebra, \(C^*\)-algebras and \(W^*\)-algebras in relation to group representations, Completely bounded maps, Mathematics - Operator Algebras, 43A30, 46L07, 22D25, 47B65, Positive linear operators and order-bounded operators, Fourier-Stieltjes algebra, 01 natural sciences, Functional Analysis (math.FA), Fourier algebra, Mathematics - Functional Analysis, Piecewise affine maps, FOS: Mathematics, Operator spaces and completely bounded maps, Fourier and Fourier-Stieltjes transforms on nonabelian groups and on semigroups, etc, 0101 mathematics, Operator Algebras (math.OA), Analysis

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Access URL: http://arxiv.org/abs/math/0405063
https://zbmath.org/2207247
https://doi.org/10.1016/j.jfa.2004.11.011
https://ui.adsabs.harvard.edu/abs/2004math......5063I/abstract
https://www.sciencedirect.com/science/article/pii/S0022123604004215
https://core.ac.uk/display/82033219
https://www.sciencedirect.com/science/article/abs/pii/S0022123604004215

Sums of Bisectorial Operators and Applications: Sums of bisectorial operators and applications

Authors: Wolfgang Arendt Shangquan Bu

Source: Integral Equations and Operator Theory. 52:299-321

Subject Terms: interpolation spaces, One-parameter semigroups and linear evolution equations, bisectorial operators, Applications of operator theory to differential and integral equations, method of sums, maximal regularity, Spectrum, resolvent, Positive linear operators and order-bounded operators, 0101 mathematics, 01 natural sciences

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Access URL: https://zbmath.org/2195001
https://doi.org/10.1007/s00020-005-1350-z
https://link.springer.com/article/10.1007/s00020-005-1350-z
https://link.springer.com/content/pdf/10.1007%2Fs00020-005-1350-z.pdf
https://www.uni-ulm.de/fileadmin/website_uni_ulm/mawi.inst.020/arendt/downloads/pubbib/short/2005-AreBu-SmsBscOprApp.pdf

Order and algebra isomorphisms of spaces of regular operators

Authors: Wickstead, Anthony

Source: Mathematische Annalen. 332:767-774

Subject Terms: Banach lattices, name=General Mathematics, Banach algebra, 0211 other engineering and technologies, Linear spaces of operators, 02 engineering and technology, Positive linear operators and order-bounded operators, 0101 mathematics, Spaces of operators, tensor products, approximation properties, Banach lattice, 01 natural sciences, regular operator

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Access URL: https://dialnet.unirioja.es/servlet/articulo?codigo=2806837
https://link.springer.com/article/10.1007%2Fs00208-005-0652-4
https://link.springer.com/content/pdf/10.1007%2Fs00208-005-0652-4.pdf
https://pure.qub.ac.uk/portal/en/publications/order-and-algebra-isomorphisms-of-spaces-of-regular-operators(f4fadb81-a528-408e-b936-e3310d4ef680)/export.html

Hilbert space structure and positive operators

Authors: Dimosthenis Drivaliaris Nikos Yannakakis

Source: Journal of Mathematical Analysis and Applications. 305:560-565

Subject Terms: Hilbert subspaces (= operator ranges), complementation (Aronszajn, de Branges, etc.), Positive operator, 0211 other engineering and technologies, symmetric operator, 02 engineering and technology, Positive linear operators and order-bounded operators, 46B03, 46C15, 47B99, Linear accretive operators, dissipative operators, etc, 01 natural sciences, Hilbert space characterization, Duality and reflexivity in normed linear and Banach spaces, Symmetric operator, FOS: Mathematics, 0101 mathematics, positive operator, accretive operator, Applied Mathematics, equivalent norm, Equivalent norm, Functional Analysis (math.FA), Mathematics - Functional Analysis, Accretive operator, complemented subspace, Complemented subspace, Analysis

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Access URL: http://arxiv.org/abs/0805.4721
https://core.ac.uk/display/81952634
https://www.sciencedirect.com/science/article/abs/pii/S0022247X04010273
https://arxiv.org/abs/0805.4721
https://arxiv.org/pdf/0805.4721
http://ui.adsabs.harvard.edu/abs/2005JMAA..305..560D/abstract
https://www.sciencedirect.com/science/article/pii/S0022247X04010273

On lifting of operators to Hilbert spaces induced by positive selfadjoint operators

Authors: Cojuhari P. Gheondea, A.

Source: Journal of Mathematical Analysis and Applications

Subject Terms: boundary value problems, induced Hilbert space, Positive linear operators and order-bounded operators, 01 natural sciences, Energy Space, Boundary value problems, Boundary value problems for second-order elliptic equations, Spectrum, energy space, 0101 mathematics, lifting of operators, Induced Hilbert Space, General theory of partial differential operators, Applications of operator theory to differential and integral equations, Applied Mathematics, General topics in linear spectral theory for PDEs, Theorems of Hahn-Banach type, extension and lifting of functionals and operators, Energy space, Sobolev space, estimation of the spectrum, Boundary Value Problems, Lifting of operators, partial differential operators, Induced Hilbert space, positive unbounded operators, Analysis, Lifting Of Operators

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Access URL: https://zbmath.org/2157702
https://doi.org/10.1016/j.jmaa.2004.09.048
https://www.sciencedirect.com/science/article/pii/S0022247X04007887
https://core.ac.uk/display/52922202
http://www.sciencedirect.com/science/article/pii/S0022247X04007887
http://yoksis.bilkent.edu.tr/pdf/files/10.1016-j.jmaa.2004.09.048.pdf
https://ui.adsabs.harvard.edu/abs/2005JMAA..304..584C/abstract
https://hdl.handle.net/11693/24077
https://hdl.handle.net/11693/11356

The von Neumann Problem for Nonnegative Symmetric Operators: The von Neumann problem for nonnegative symmetric operators

Authors: Yury Arlinskii Eduard Tsekanovskii

Source: Integral Equations and Operator Theory. 51:319-356

Subject Terms: Linear symmetric and selfadjoint operators (unbounded), Friedrichs and Kreĭn--von Neumann extension, Weyl--Titchmarsh operator-valued function, boundary triplet, Linear operator inequalities, nonnegative self-adjoint extension, Positive linear operators and order-bounded operators, Kreĭn--Langer \(Q\)-function, 0101 mathematics, 01 natural sciences

File Description: application/xml

Access URL: https://link.springer.com/article/10.1007%2Fs00020-003-1260-x
https://link.springer.com/content/pdf/10.1007%2Fs00020-003-1260-x.pdf

Characterization of integral operators with semi-separable kernels with symmetries

Authors: André C. M. Ran M.A. Petersen G. J. Groenewald

Source: Journal of Functional Analysis. 219:255-284

Subject Terms: Integral operators, SDG 16 - Peace, Positive real integral operators, J-unitary integral operators, Matrix equations and identities, Semi-separable kernels, Positive linear operators and order-bounded operators, Contractive integral operators, Linear accretive operators, dissipative operators, etc, dissipative integral operators, 01 natural sciences, Justice and Strong Institutions, Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones), semi-separable kernels, positive integral operators, Self-adjoint integral operators, Factorization theory (including Wiener-Hopf and spectral factorizations) of linear operators, \(J\)-unitary integral operators, contractive integral operators, Dissipative integral operators, positive real integral operators, self-adjoint integral operators, 0101 mathematics, Analysis, Positive integral operators

File Description: application/xml

Access URL: https://zbmath.org/2141627
https://doi.org/10.1016/j.jfa.2004.05.008
https://core.ac.uk/display/82765420
https://www.cs.vu.nl/~ran/saintop.pdf
https://www.sciencedirect.com/science/article/pii/S0022123604002174
https://research.vu.nl/en/publications/characterization-of-integral-operators-with-semi-separable-kernel

Korovkin-type theorem and application

Authors: Wang Heping

Source: Journal of Approximation Theory. 132:258-264

Subject Terms: Mathematics(all), Numerical Analysis, q-Bernstein operators, Applied Mathematics, Approximation by positive operators, Korovkin-type theorem, Positive linear operators and order-bounded operators, 0101 mathematics, 01 natural sciences, \(q\)-Bernstein operators, Analysis

File Description: application/xml

Access URL: https://zbmath.org/2165386
https://doi.org/10.1016/j.jat.2004.12.010
https://dl.acm.org/doi/10.5555/1063186.1712450
https://www.sciencedirect.com/science/article/pii/S0021904504002175
https://core.ac.uk/display/82545870
https://www.sciencedirect.com/science/article/abs/pii/S0021904504002175
https://dblp.uni-trier.de/db/journals/jat/jat132.html#Heping05
https://dialnet.unirioja.es/servlet/articulo?codigo=1107957

Function cones and interpolation

Authors: Joan Cerdà Heribert Coll

Source: Mathematische Nachrichten. 278:227-239

Subject Terms: real interpolation, function cone, Interpolation between normed linear spaces, Abstract interpolation of topological vector spaces, linear and bilinear operators, Banach function space, Positive linear operators and order-bounded operators, 0101 mathematics, K-functional, 01 natural sciences, level set, Spaces of measurable functions (\(L^p\)-spaces, Orlicz spaces, Köthe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.)

File Description: application/xml

Access URL: https://zbmath.org/2159839
https://doi.org/10.1002/mana.200310237
https://onlinelibrary.wiley.com/doi/abs/10.1002/mana.200310237