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  • 1
    UID:
    b3kat_BV036492556
    Format: 1 Online-Ressource
    ISBN: 9783764389116
    Language: English
    Keywords: Innenproduktraum ; Linearer Operator ; Spektraltheorie ; Konferenzschrift
    Author information: Langer, Heinz 1935-2024
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  • 2
    UID:
    almahu_9947363190702882
    Format: 336 p. , online resource.
    ISBN: 9783034854566
    Series Statement: Operator Theory: Advances and Applications, 2
    Content: The first of the annual Operator Theory conferences in Ti­ mi~oara held four years ago was a meeting of operator theory spe­ cialists from the National Institute for Scientific and Techni­ cal Creation in Bucharest and from the University of Timi~oara. Since then, the participation to these conferences has greatly increased, by being attended first by operator theorists from allover the country and (since 1978) by an increasing number of foreign mathematicians. Thus the 1980 Conference can be regarded as a truly international Operator Theory meeting, fifteen coun­ tries being represented at it. These conferences are conceived as a means to promote the cooperation between specialists in all areas of Operator Theory. Among the main topics in 1980 were: dilation theory, invariant subspaces, connections with the theory of cX-algebras, subnormal operators, multidimensional functional calculus etc. Though not included in this volume, we would like to mention that in 1980 some special sessions concerning other fields of Functional Ana­ lysis were organized at the Operator Theory conference. The research contracts of the Department of Mathematics of INCREST with the National Council for Sciences and Technoloa,y of Romania provided the means for developping the research activi­ ty in Functional Analysis; these contracts constitute the gene­ rous framework for these meetings.
    Note: On Closed Operator Algebras Generated by Analytic Functional Calculi -- A Conjecture Concerning the Pure States of B(H) and a Related Theorem -- A C*-Algebra Approach to the Cowen-Douglas Theory -- On Periodic Distribution Groups -- On the Smoothness of Elements of Ext -- Triviality Theorems for Hilbert Modules -- Exact Controllability and Spectrum Assignment -- Generalized Derivations -- Commutants Modulo the Compact Operators of Certain CSL Algebras -- Similarity of Operator Blocks and Canonical Forms. II. Infinite Dimensional Case and Wiener-Hopf Factorization -- Unitary Orbits of Power Partial Isometries and Approximation by Block-Diagonal Nilpotents -- Isomorphisms of Automorphism Groups of Type II Factors -- A Spectral Residuum for Each Closed Operator -- Two Applications of Hankel Operators -- A Rohlin Type Theorem for Groups Acting on von Neumann Algebras -- Derivations of C*-Algebras which Are Invariant Under an Automorphism Group -- Remarks on Ideals of the Calkin-Algebra for Certain Singular Extensions -- Modelling by L2-Bounded Analytic Functions -- The Maximal Function of Doubly Commuting Contractions -- Remarks on Hilbert-Schmidt Perturbations of Almost — Normal Operators -- Derivation Ranges: Open Problems.
    In: Springer eBooks
    Additional Edition: Printed edition: ISBN 9783764312442
    Language: English
    Keywords: Konferenzschrift
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  • 3
    UID:
    almahu_9947363190902882
    Format: 229 p. , online resource.
    ISBN: 9783034854450
    Series Statement: Operator Theory: Advances and Applications, 6
    Content: The annual Operator Theory conferences in Timigoara are conceived as a means to promote cooperation and exchange of in­ formation between specialists in all areas of Operator Theory. The present volume consist of papers contributed by the partici­ pants of the 1981 Conference. Since many of these papers contain results on the invariant subspace problem or are related to the role of invariant subspaces in the study of operators or operator systems, we thought it appropiate to mention this in the title of the volume, though the "other topics" have a wide range. As in past years, special sessions concerning other fields of Functio­ nal Analysis were organized at the 1981 Conference, but contri­ butions to these sessions are not included in the present volume. The research contracts of the Department of Mathematics of INCREST with the National Council for Sciences and Technology of Romaliia provided the means for developping the research activity in Functional Analysis; these contracts constitute the generous framework for these meetings. We want also to acknowledge the support of INCREST and the excelent organizing job done by our host - University of Timigoa­ ra-. Professor Dumitru Gagpar and Professor Mircea Reghig are among those people in Timigoara who contributed in an essential way to the success of the meeting.
    Note: The Stone-Weierstrass Problem for C*-Algebras -- On the Norm-Closure of the Similarity Orbit of Essentially Nilpotent Operators -- Invariant Subspaces and Functional Representations for the C1. Contractions -- Intertwinings and Hyperinvariant Subspaces -- On Moduli for Invariant Subspaces -- An Extension of Chacon-Ornstein Ergodic Theorem -- Commuting Subnormal Operators Quasisimilar to Multiplication by Coordinate Functions on ODD Spheres -- Some Properties of Masa’s in Factors -- Generalized Resolvents of Dual Pairs of Contractions -- Annihilators of Operator Algebras -- On the Derivations with Norm Closed Range in Banach Spaces -- On Boolean Algebras of Projections and Prespectral Operators -- Control Subspaces of Minimal Dimension, and Spectral Multiplicities -- Derivations of C*-Algebras which are Invariant under an Automorphism Group. II -- On Commutators in Properly Infinite W*-Algebras -- A Functional Model for the Unitary Dilation of a Positive Definite Map -- The Levinson Algorithm in Linear Prediction -- Geometric Interpretation of the Essential Minimum Modulus.
    In: Springer eBooks
    Additional Edition: Printed edition: ISBN 9783034854474
    Language: English
    Keywords: Konferenzschrift ; Konferenzschrift ; Konferenzschrift
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  • 4
    UID:
    almahu_9947363188702882
    Format: 375 p. , online resource.
    ISBN: 9783034876988
    Series Statement: Operator Theory: Advances and Applications ; 17
    Content: The annual Operator Theory conferences, organized by the Department of Mathematics of INC REST and the University of Timi?oara, are intended to promote cooperation and exchange of information between specialists in all areas of operator theory. This volume consists of papers contributed by the participants of the 1984 Conference. They reflect a great variety of topics, dealt with by the modern operator theory, including very recent advances in the invariant subspace problem, subalgebras of operator algebras, hyponormal, Hankel and other special classes of operators, spectral decompositions, aspects of dilation theory and so on. The research contracts of the Department of Mathematics of INCREST with the National Council for Science and Technology of Romania provided the means for developing the research activity in mathematics; they represent the generous framework of these meetings, too. It is our pleasure to acknowledge the financial support of UNESCO which also contibuted to the success of this meeting. We are indebted to Professor Israel Gohberg for including these Proceedings in the OT Series and for valuable advice in the editing process. Birkhauser Verlag was very cooperative in publishing this volume. Mariana Bota, Camelia Minculescu and Rodica Stoenescu dealt with the difficult task of typing the whole manuscript using a Rank Xerox 860 word processor; we thank them for the excellent job they did.
    Note: Some topics in the theory of decomposable operators -- Korovkin closures in Banach algebras -- On the theory of the class % MathType!MTEF!2!1!+- % feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyqamaaBa % aaleaacqGH1ecWdaWgaaadbaGaaGimaaqabaaaleqaaaaa!397A!$${A_{{\aleph _0}}}$$ with applications to invariant subspaces and the Bergman shift operator -- Examples of chains of invariant subspaces -- Isometric dilations of commuting contractions. IV -- Recent results on reflexivity of operators and algebras of operators -- Schur analysis for matrices with finite number of negative squares -- Uniform algebras, Hankel operators and invariant subspaces -- Contractions génériques -- Hilbert modules over function algebras -- Differential equation of an inner function. II -- On a class of unitary operators in Krein space -- Naimark dilations, state-space generators and transmission lines -- Contractions being weakly similar to unitaries -- A characterization of generalized zeros of negative type of functions of the class N? -- Skew-symmetric operators and isometries on a real Banach space with a hyperorthogonal basis -- On the operator equation ax + (ax)* ? ?x= b -- On the inverse problem of a dissipative scattering theory. I -- Some spectral properties of an operator -- Hyponormal operators and eigendistributions -- The invariant subspace problem: a description with further applications of a combinatorial proof -- Some results on cohomology with Borel cochains, with applications to group action on operator algebras -- Spectral mapping theorems for analytic functional calculi -- Prediction theory and choice sequences: an alternate approach -- Idael properties of order bounded operators on ordered Banach spaces which are not Banach lattices -- More about pseudodifferential operators on bounded domains.
    In: Springer eBooks
    Additional Edition: Printed edition: ISBN 9783034877008
    Language: English
    Keywords: Konferenzschrift ; Konferenzschrift
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  • 5
    UID:
    gbv_877647267
    Format: 280 pages , maps , 22 x 31 cm
    ISBN: 0869233092 , 9780869233092 , 0869233106 , 9780869233108
    Note: Includes bibliographical references and index
    Additional Edition: Erscheint auch als Online-Ausgabe Mazikana, P.C Zimbabwe epic Harare : National Archives, 1982
    Language: English
    Keywords: Simbabwe ; Geschichte Anfänge-1982 ; Bildband ; Bildband
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