Výsledky vyhledávání - Quasitriangular and quasitriangular, quasidiagonal and quasidiagonal linear operators

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

Autoři: Nathanial P. Brown

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: 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

Around quasidiagonal operators

Autoři: Dan Voiculescu

Zdroj: Integral Equations and Operator Theory. 17:137-149

Témata: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Research exposition (monographs, survey articles) pertaining to operator theory, \(K\)-theory and operator algebras (including cyclic theory), Hilbert space operators, 0101 mathematics, Noncommutative topology, 01 natural sciences, quasidiagonality

Popis souboru: application/xml

Přístupová URL adresa: https://link.springer.com/content/pdf/10.1007/BF01322551.pdf
https://link.springer.com/article/10.1007/BF01322551

Quasitriangular $+$ small compact $=$ strongly irreducible: Quasitriangular + small compact = strongly irreducible

Autoři: You Qing Ji

Zdroj: Transactions of the American Mathematical Society. 351:4657-4673

Témata: Linear operator approximation theory, index, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Perturbation theory of linear operators, strongly irreducible, Weyl spectrum, quasitriangular, Linear operators defined by compactness properties, Spectrum, resolvent, 0101 mathematics, 01 natural sciences

Popis souboru: application/xml

Přístupová URL adresa: https://www.ams.org/tran/1999-351-11/S0002-9947-99-02307-7/S0002-9947-99-02307-7.pdf
https://www.ams.org/journals/tran/1999-351-11/S0002-9947-99-02307-7/
https://www.ams.org/tran/1999-351-11/S0002-9947-99-02307-7/S0002-9947-99-02307-7.pdf
https://dialnet.unirioja.es/servlet/articulo?codigo=477231

Linear preservers on upper triangular operator matrix algebras

Autoři: Bingren Li Jianlian Cui Jinchuan Hou

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: 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

Quasidiagonal operator algebras

Autoři: Wagner, Bruce H.

Zdroj: Illinois J. Math. 35, iss. 3 (1991), 451-467

Témata: quasitriangular algebra associated to a nest, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Classifications of \(C^*\)-algebras, Abstract operator algebras on Hilbert spaces, 46L99, block-diagonal, 47D25

Popis souboru: application/xml; application/pdf

Přístupová URL adresa: https://zbmath.org/9464
https://projecteuclid.org/download/pdf_1/euclid.ijm/1255987790
https://projecteuclid.org/euclid.ijm/1255987790
http://projecteuclid.org/euclid.ijm/1255987790

Factorization of unbounded operators on Köthe spaces

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

Zdroj: Studia Mathematica. 161:61-70

Témata: 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.)

Popis souboru: application/xml; application/pdf

Přístupová URL adresa: 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

On bi-quasitriangular operators

Autoři: L. J. Gray

Zdroj: Proceedings of the American Mathematical Society. 64:291-294

Témata: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Closed Range, Nilpotent Operator, 0101 mathematics, Bi-Quasitriangular, Algebraic Operator, 01 natural sciences

Popis souboru: application/xml

Přístupová URL adresa: https://www.ams.org/proc/1977-064-02/S0002-9939-1977-0454698-X/S0002-9939-1977-0454698-X.pdf
https://zbmath.org/3624270
https://doi.org/10.2307/2041445
http://www.osti.gov/scitech/biblio/6234209-bi-quasitriangular-operators
https://www.ams.org/proc/1977-064-02/S0002-9939-1977-0454698-X/S0002-9939-1977-0454698-X.pdf
https://www.ams.org/journals/proc/1977-064-02/S0002-9939-1977-0454698-X/home.html

Separating vectors for operators

Autoři: Han, D. Larson, D. Pan, Z. a další

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: 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

Autoři: Ciprian Foias Il Bong Jung Eungil Ko a další

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: 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

Extensions of operators: Extensions of operators.

Autoři: Han, D. Larson, D. Pan, Z. a další

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

Témata: 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

Popis souboru: application/xml; application/pdf

Přístupová URL adresa: 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

Quasitriangulierbare Operatoren und invariante Untervektorräume stetiger linearer Operatoren. (Quasitriangular operators and invariant subspaces of continuous linear operators.)

Autoři: Meyer-Nieberg, Peter

Témata: Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Invariant subspaces of linear operators

Popis souboru: application/xml

Přístupová URL adresa: https://zbmath.org/3360821

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

Autoři: M. M. Malamud

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: https://zbmath.org/1971369
https://doi.org/10.1023/a:1022888921572
https://link.springer.com/article/10.1023/A%3A1022888921572

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

Autoři: In Sung Hwang Woo Young Lee

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

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

Popis souboru: application/xml

Přístupová URL adresa: https://link.springer.com/article/10.1007/BF01332656

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

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

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: 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

Realizations for Schur upper triangular operators centered at an arbitrary point

Autoři: Daniel Alpay Y. Peretz

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: https://link.springer.com/article/10.1007/BF01194480

Operator semigroups with quasinilpotent commutators

Autoři: Peter Rosenthal Victor Shulman Heydar Radjavi

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

Témata: 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

Popis souboru: application/xml

Přístupová URL adresa: 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

On Bitangential Interpolation in the Time-Varying Setting for Hilbert–Schmidt Operators: The Continuous Time Case: On bitangential interpolation in the time-varying setting for Hilbert-Schmidt operators: The continuous time case

Autoři: Alpay, Daniel Bolotnikov, V. Freydin, B. a další

Zdroj: Journal of Mathematical Analysis and Applications. 228:275-292

Témata: Linear operators belonging to operator ideals (nuclear, \(p\)-summing, in the Schatten-von Neumann classes, etc.), nonstationary setting, Applied Mathematics, bitangential interpolation problem, time-varying systems, 01 natural sciences, multiplication operators by bounded measurable functions, Algebra, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Discrete Mathematics and Combinatorics, lower triangular integral Hilbert-Schmidt operators, two-sided Nudelman interpolation problem, 0101 mathematics, Other Mathematics, Linear operator methods in interpolation, moment and extension problems, bounded upper triangular operators, Analysis

Popis souboru: application/xml

Přístupová URL adresa: https://zbmath.org/1246320
https://doi.org/10.1006/jmaa.1998.6102
https://www.sciencedirect.com/science/article/pii/S0022247X98961029
https://core.ac.uk/display/82039707
https://digitalcommons.chapman.edu/scs_articles/466/
https://www.sciencedirect.com/science/article/abs/pii/S0022247X98961029
http://www.sciencedirect.com/science/article/pii/S0022247X98961029

On the Ideal-Triangularizability of Semigroups of Quasinilpotent Positive Operators on C(K): On the ideal-triangularizability of semigroups of quasinilpotent positive operators on \(C(\mathcal K)\)

Autoři: M. T. Jahandideh

Zdroj: Canadian Mathematical Bulletin. 41:298-305

Témata: Banach lattice version of triangularizability, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, positive lower-semicontinuous kernels, Linear operators on function spaces (general), ideal-triangularizability, triangularizable, locally compact Hausdorff-Lindelöf space, Positive linear operators and order-bounded operators, 0101 mathematics, 01 natural sciences, semigroup of quasinilpotent integral operators

Popis souboru: application/xml

Přístupová URL adresa: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008439500005920
https://cms.math.ca/10.4153/CMB-1998-042-4

The index of triangular operator matrices

Autoři: Béla Nagy K.-H. Förster

Zdroj: Proceedings of the American Mathematical Society. 128:1167-1176

Témata: Banach lattices, index, triangular operator matrix, Eigenvalues, singular values, and eigenvectors, order of a pole of the resolvent, nonnegative operator, direct sum of complex Banach spaces, Positive linear operators and order-bounded operators, Banach lattice, Rothblum index theorem, Laurent series, 01 natural sciences, Positive matrices and their generalizations, cones of matrices, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, Spectrum, resolvent, 0101 mathematics

Popis souboru: application/xml

Přístupová URL adresa: https://www.ams.org/proc/2000-128-04/S0002-9939-99-05341-1/S0002-9939-99-05341-1.pdf
https://zbmath.org/1414973
https://doi.org/10.1090/s0002-9939-99-05341-1
https://www.ams.org/proc/2000-128-04/S0002-9939-99-05341-1/S0002-9939-99-05341-1.pdf
https://www.ams.org/journals/proc/2000-128-04/S0002-9939-99-05341-1/home.html
https://www.jstor.org/stable/119793
https://dialnet.unirioja.es/servlet/articulo?codigo=702751

On the triangular factorization of positive operators

Autoři: Mikhail I. Belishev A. B. Pushnitskii

Zdroj: Journal of Mathematical Sciences. 96:3312-3320

Témata: BC-method, Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators, boundary control theory, amplitude integral, inverse problems, Factorization theory (including Wiener-Hopf and spectral factorizations) of linear operators, Hermitian and normal operators (spectral measures, functional calculus, etc.), operator integral, 0101 mathematics, triangular factorization, 01 natural sciences

Popis souboru: application/xml

Přístupová URL adresa: https://zbmath.org/1393022
https://doi.org/10.1007/bf02172806
https://link.springer.com/article/10.1007/BF02172806