Parameterization of All Solutions of the Three Chains Completion Problem: Parametrization of all solutions of the three chains completion problem

Συγγραφείς: Ciprian Foias, Arthur E. Frazho, Marinus A. Kaashoek, Israel Gohberg

Πηγή: Metric Constrained Interpolation, Commutant Lifting and Systems ISBN: 9783034897754

Θεματικοί όροι: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, 0101 mathematics, Moment problems and interpolation problems in the complex plane, 16. Peace & justice, Linear operator methods in interpolation, moment and extension problems, 01 natural sciences, suboptimal nonstationary Nehari problem, contractive upper triangular operators

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/1113586
https://doi.org/10.1007/bf01193812
https://link.springer.com/chapter/10.1007/978-3-0348-8791-5_15
https://link.springer.com/content/pdf/10.1007/BF01193812.pdf
https://rd.springer.com/chapter/10.1007/978-3-0348-8791-5_15

Separating vectors for operators

Συγγραφείς: Han, D., Larson, D., Pan, Z., Wogen, W.

Πηγή: Proceedings of the American Mathematical Society. 135:713-723

Θεματικοί όροι: Structure theory of linear operators, Extension of operators, triangular operator, domain, separating vector, Integral domain, operator extension, 16. Peace & justice, Special classes of linear operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, REFLEXIVITY, EXTENSIONS, Applied, extension of operators, Separating vector, Spectrum, resolvent, integral, ALGEBRAS, Mathematics, integral domain, Triangular operator

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Σύνδεσμος πρόσβασης: https://www.ams.org/proc/2007-135-03/S0002-9939-06-08486-3/S0002-9939-06-08486-3.pdf
https://zbmath.org/5120278
https://doi.org/10.1090/s0002-9939-06-08486-3
https://www.ams.org/journals/proc/2007-135-03/S0002-9939-06-08486-3/home.html
https://ams.org/journals/proc/2007-135-03/S0002-9939-06-08486-3/S0002-9939-06-08486-3.pdf
https://www.jstor.org/stable/20534625

Operators that admit a moment sequence

Συγγραφείς: Ciprian Foias, Il Bong Jung, Eungil Ko, Carl Pearcy

Πηγή: Israel Journal of Mathematics. 145:83-91

Θεματικοί όροι: bounded operator, Borel measure, Invariant subspaces of linear operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Moment problems, Hilbert space, quasitriangular operator, 0101 mathematics, 01 natural sciences, General theory of linear operators

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/2164535
https://doi.org/10.1007/bf02786685
https://dspace.ewha.ac.kr/handle/2015.oak/219572
https://link.springer.com/article/10.1007/BF02786685

The classes of local spectral theory

Συγγραφείς: Gabriel T. Prǎjiturǎ

Πηγή: Journal of Mathematical Analysis and Applications. 305:175-182

Θεματικοί όροι: Local spectral properties of linear operators, Closure, Applied Mathematics, interior, Spectral operators, decomposable operators, well-bounded operators, etc, closure, single-valued extension property, 01 natural sciences, Similarity, spectrum, Bishop's property, Interior, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, decomposition property, Spectrum, operator, Operator, 0101 mathematics, similarity, Analysis

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/2159782
https://doi.org/10.1016/j.jmaa.2004.11.013
https://www.sciencedirect.com/science/article/abs/pii/S0022247X04009308
https://core.ac.uk/display/82592810
http://ui.adsabs.harvard.edu/abs/2005JMAA..305..175P/abstract
https://www.sciencedirect.com/science/article/pii/S0022247X04009308

Near Triangularizability Implies Triangularizability: Near triangularizability implies triangularizability

Συγγραφείς: Bamdad R. Yahaghi

Πηγή: Canadian Mathematical Bulletin. 47:298-313

Θεματικοί όροι: 0301 basic medicine, Invariant subspaces of linear operators, Linear transformations, semilinear transformations, reducibility, 16. Peace & justice, 01 natural sciences, Groups and semigroups of linear operators, 03 medical and health sciences, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Algebras of operators on Banach spaces and other topological linear spaces, triangularizability, 0101 mathematics, invariant subspaces, linear transformations, compact operators

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/2158200
https://doi.org/10.4153/cmb-2004-029-x
https://cms.math.ca/10.4153/CMB-2004-029-x
https://www.cambridge.org/core/journals/canadian-mathematical-bulletin/article/near-triangularizability-implies-triangularizability/F502B38EF7AB609E2DFA6E09D95DD59F

Extensions of operators: Extensions of operators.

Συγγραφείς: Han, D., Larson, D., Pan, Z., Wogen, W.

Πηγή: Indiana University Mathematics Journal. 53:1151-1170

Θεματικοί όροι: Structure theory of linear operators, triangular operators, Kato spectrum, 01 natural sciences, Special classes of linear operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, REFLEXIVITY, Dilations, extensions, compressions of linear operators, extension spectrum, spectral mapping theorem, extension of operators, Spectrum, resolvent, 0101 mathematics, Mathematics

Περιγραφή αρχείου: application/xml; application/pdf

Σύνδεσμος πρόσβασης: https://zbmath.org/2124622
https://doi.org/10.1512/iumj.2004.53.2450
https://documat.unirioja.es/servlet/articulo?codigo=1032263
https://www.math.tamu.edu/~larson/hlpw-final.pdf
https://dialnet.unirioja.es/servlet/articulo?codigo=1032263

Factorization of unbounded operators on Köthe spaces

Συγγραφείς: Terzioğlu, Tosun, Yurdakul, M., Zakharyuta, Vyacheslav

Πηγή: Studia Mathematica. 161:61-70

Θεματικοί όροι: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Locally convex Fréchet spaces and (DF)-spaces, locally convex spaces, bounded factorization property, QA Mathematics, 0101 mathematics, quasidiagonal operators, 01 natural sciences, Sequence spaces (including Köthe sequence spaces), Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.)

Περιγραφή αρχείου: application/xml; application/pdf

Σύνδεσμος πρόσβασης: https://www.impan.pl/shop/publication/transaction/download/product/90197?download.pdf
https://zbmath.org/2092354
https://doi.org/10.4064/sm161-1-4
https://www.impan.pl/pl/wydawnictwa/czasopisma-i-serie-wydawnicze/studia-mathematica/all/161/1/90197/factorization-of-unbounded-operators-on-kothe-spaces
http://yadda.icm.edu.pl/yadda/element/bwmeta1.element.bwnjournal-article-doi-10_4064-sm161-1-4
https://research.sabanciuniv.edu/425/
https://eudml.org/doc/285189
https://www.impan.pl/shop/publication/transaction/download/product/90197?download.pdf
http://core.ac.uk/display/11738318

Similarity of a Triangular Operator to a Diagonal Operator: Similarity of a triangular operator to a diagonal operator

Συγγραφείς: M. M. Malamud

Πηγή: Journal of Mathematical Sciences. 115:2199-2222

Θεματικοί όροι: Structure theory of linear operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Nagy-Foiaş criterion, dissipative operator, resolvent criterion, Linear operators on function spaces (general), 0101 mathematics, Gohberg and Krein criterion, similarity to a self-adjoint operator, 01 natural sciences

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/1971369
https://doi.org/10.1023/a:1022888921572
https://link.springer.com/article/10.1023/A%3A1022888921572

similarity of a triangular operator to a diagonal operator: Similarity of a triangular operator to a diagonal operator

Συγγραφείς: M. M. Malamud

Πηγή: Journal of Mathematical Sciences. 115(2):2199-2222

Θεματικοί όροι: Structure theory of linear operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Nagy-Foiaş criterion, dissipative operator, resolvent criterion, Linear operators on function spaces (general), Gohberg and Krein criterion, similarity to a self-adjoint operator

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/1971369
https://doi.org/10.1023/a:1022888921572
https://link.springer.com/article/10.1023/A%3A1022888921572

On the Triangular Factorization of Isomorphisms: On the triangular factorization of isomorphisms

Συγγραφείς: Mikhail I. Belishev

Πηγή: Journal of Mathematical Sciences. 111:3639-3644

Θεματικοί όροι: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, amplitude integral, Factorization theory (including Wiener-Hopf and spectral factorizations) of linear operators, isomorphisms of Hilbert space, Spectrum, resolvent, 0101 mathematics, Applications of operator theory in systems, signals, circuits, and control theory, dynamical inverse problems, triangular factorization, 01 natural sciences

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://link.springer.com/article/10.1023/A:1016373507011

on the triangular factorization of isomorphisms: On the triangular factorization of isomorphisms

Συγγραφείς: Mikhail I. Belishev

Πηγή: Journal of Mathematical Sciences. 111(4):3639-3644

Θεματικοί όροι: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, amplitude integral, Factorization theory (including Wiener-Hopf and spectral factorizations) of linear operators, isomorphisms of Hilbert space, Spectrum, resolvent, Applications of operator theory in systems, signals, circuits, and control theory, dynamical inverse problems, triangular factorization

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://link.springer.com/article/10.1023/A:1016373507011

Triangular Toeplitz contractions and Cowen sets for analytic polynomials

Συγγραφείς: Woo Young Lee, Muneo Chō, Raúl E. Curto

Πηγή: Proceedings of the American Mathematical Society. 130:3597-3604

Θεματικοί όροι: hyponormal Toeplitz operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, spectral norm, reduced Cowen set for an analytic polynomial, Toeplitz operators, Hankel operators, Wiener-Hopf operators, Norms of matrices, numerical range, applications of functional analysis to matrix theory, Hermitian, skew-Hermitian, and related matrices, strictly convex, Blaschke products, etc, 0101 mathematics, Subnormal operators, hyponormal operators, etc, triangular Toeplitz contractions, 01 natural sciences

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://www.ams.org/proc/2002-130-12/S0002-9939-02-06628-5/S0002-9939-02-06628-5.pdf
http://www.math.snu.ac.kr/~wylee/CCL.pdf
http://homepage.math.uiowa.edu/~rcurto/ttc.pdf
https://www.jstor.org/stable/1194401
https://www.ams.org/proc/2002-130-12/S0002-9939-02-06628-5/S0002-9939-02-06628-5.pdf
https://www.ams.org/journals/proc/2002-130-12/S0002-9939-02-06628-5/home.html
http://www.math.uiowa.edu/~rcurto/ttc.pdf

Herrero's Approximation Problem for Quasidiagonal Operators: Herrero's approximation problem for quasidiagonal operators

Συγγραφείς: Nathanial P. Brown

Πηγή: Journal of Functional Analysis. 186:360-365

Θεματικοί όροι: Linear operator approximation theory, quasidiagonal operator, 46L05, exact \(C^*\)-algebra, Mathematics - Operator Algebras, norm limits of block diagonal operators, separable Hilbert space, 01 natural sciences, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, blocks of bounded dimension, FOS: Mathematics, 0101 mathematics, Operator Algebras (math.OA), Analysis

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: http://arxiv.org/abs/math/0009059
https://zbmath.org/1703080
https://doi.org/10.1006/jfan.2001.3787
https://pennstate.pure.elsevier.com/en/publications/herreros-approximation-problem-for-quasidiagonal-operators
https://www.sciencedirect.com/science/article/pii/S0022123601937875
http://ui.adsabs.harvard.edu/abs/2000math......9059B/abstract
https://core.ac.uk/display/82621781

Linear preservers on upper triangular operator matrix algebras

Συγγραφείς: Bingren Li, Jianlian Cui, Jinchuan Hou

Πηγή: Linear Algebra and its Applications. 336:29-50

Θεματικοί όροι: Numerical Analysis, Automorphisms, Algebra and Number Theory, automorphisms, Abstract operator algebras on Hilbert spaces, Linear transformations, semilinear transformations, rank preserving maps, Rank preserving maps, 01 natural sciences, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, upper triangular matrix algebras, Discrete Mathematics and Combinatorics, Geometry and Topology, 0101 mathematics, Upper triangular matrix algebras, Topological algebras of operators, Jordan isomorphisms

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/1702090
https://doi.org/10.1016/s0024-3795(01)00288-9
https://www.sciencedirect.com/science/article/pii/S0024379501002889
https://www.sciencedirect.com/science/article/abs/pii/S0024379501002889

The boundedness below of 2�2 upper triangular operator matrices: The boundedness below of \(2\times 2\) upper triangular operator matrices

Συγγραφείς: In Sung Hwang, Woo Young Lee

Πηγή: Integral Equations and Operator Theory. 39:267-276

Θεματικοί όροι: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Perturbation theory of linear operators, Spectrum, resolvent, 0101 mathematics, 01 natural sciences

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://link.springer.com/article/10.1007/BF01332656

Realizations for Schur upper triangular operators centered at an arbitrary point

Συγγραφείς: Daniel Alpay, Y. Peretz

Πηγή: Integral Equations and Operator Theory. 37:251-323

Θεματικοί όροι: nonstationary setting, Linear operators in reproducing-kernel Hilbert spaces (including de Branges, de Branges-Rovnyak, and other structured spaces), 01 natural sciences, Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones), Schur upper triangular operators centered at an arbitrary point, isometric, coisometric and unitary realizations for Schur functions, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Operator colligations (= nodes), vessels, linear systems, characteristic functions, realizations, etc, transfer functions, dissipative systems, reproducing kernel spaces, Hilbert spaces with reproducing kernels (= (proper) functional Hilbert spaces, including de Branges-Rovnyak and other structured spaces), 0101 mathematics, Linear operator methods in interpolation, moment and extension problems

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://link.springer.com/article/10.1007/BF01194480

Biquasitriangular Operators have Strongly Irreducible Perturbations: Biquasitriangular operators have strongly irreducible perturbations

Συγγραφείς: Jiang, Chun Lan, Power, Stephen C., Wang, Zong Yao

Πηγή: The Quarterly Journal of Mathematics. 51:353-369

Θεματικοί όροι: Linear operator approximation theory, biquasitriangular operator, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Perturbation theory of linear operators, approximated by a strongly irreducible operator, connected spectrum, 0101 mathematics, strongly irreducible perturbations, 10. No inequality, 16. Peace & justice, 01 natural sciences

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://zbmath.org/1544897
https://doi.org/10.1093/qjmath/51.3.353
https://documat.unirioja.es/servlet/articulo?codigo=2828407
https://dialnet.unirioja.es/servlet/articulo?codigo=2828407
https://eprints.lancs.ac.uk/id/eprint/19355
https://academic.oup.com/qjmath/article-abstract/51/3/353/1622596

Operator semigroups with quasinilpotent commutators

Συγγραφείς: Peter Rosenthal, Victor Shulman, Heydar Radjavi

Πηγή: Proceedings of the American Mathematical Society. 128:2413-2420

Θεματικοί όροι: Groups and semigroups of linear operators, Invariant subspaces of linear operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, quasinilpotent, triangularizable, multiplicative semigroup of matrices, extension field, 0101 mathematics, 01 natural sciences

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://www.ams.org/proc/2000-128-08/S0002-9939-00-05622-7/S0002-9939-00-05622-7.pdf
https://dialnet.unirioja.es/servlet/articulo?codigo=708243
https://www.jstor.org/stable/119831
https://www.ams.org/proc/2000-128-08/S0002-9939-00-05622-7/S0002-9939-00-05622-7.pdf
https://www.ams.org/journals/proc/2000-128-08/S0002-9939-00-05622-7/home.html

Non-commutative BMO space

Συγγραφείς: N. Popa

Πηγή: Archiv der Mathematik. 74:111-114

Θεματικοί όροι: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, martingle BMO-version, triangular projection, non-commutative BMO, 0103 physical sciences, Toeplitz operators, Hankel operators, Wiener-Hopf operators, 0101 mathematics, 01 natural sciences, Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.)

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://link.springer.com/article/10.1007/PL00000415
https://link.springer.com/10.1007/PL00000415

Sublinearity and Other Spectral Conditions on a Semigroup: Sublinearity and other spectral conditions on a semigroup

Συγγραφείς: Heydar Radjavi

Πηγή: Canadian Journal of Mathematics. 52:197-224

Θεματικοί όροι: Linear operators belonging to operator ideals (nuclear, \(p\)-summing, in the Schatten-von Neumann classes, etc.), Invariant subspaces of linear operators, sublinearity, Algebraic systems of matrices, spectra of pairs of operators, commutativity, reducibility, 16. Peace & justice, 01 natural sciences, Groups and semigroups of linear operators, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Linear operators defined by compactness properties, subadditivity, semigroup of compact operators, Spectrum, resolvent, triangularizability, 0101 mathematics, submultiplicativity

Περιγραφή αρχείου: application/xml

Σύνδεσμος πρόσβασης: https://cms.math.ca/cjm/abstract/pdf/149202.pdf