Matrix and Operator Valued Functions: The Vladimir Petrovich Potapov Memorial Volume (Operator Theory: Advances and Applications)

Gohberg, I. (Editor) / Sakhnovich, L.A. (Editor)

ISBN 10: 3764350911 / ISBN 13: 9783764350918

Edité par Birkhäuser Basel, 1994

A propos de cet article

1st edition. 211 pages. German language. 9.61x6.69x0.56 inches. In Stock.

N° de réf. du vendeur x-3764350911

Détails bibliographiques

• Titre: Matrix and Operator Valued Functions: The Vladimir Petrovich Potapov Memorial Volume (Operator Theory: Advances and Applications)
• Éditeur: Birkhäuser Basel
• Date de parution: 1994
• Langue: anglais
• ISBN à 10 chiffres: 3764350911
• ISBN à 13 chiffres: 9783764350918
• Reliure: Hardcover
• État de l'article: Brand New

A propos de ce titre

Synopsis

The influence of V.P. Potapov and M.G. Krein on my scientific work.- 1. My first dissertation.- 2. A tilt toward operator theory.- 3. The results of Potapov's group in network theory.- 4. Darlington method in the general theory of passive systems.- 5. Regular j-inner matrix functions and related generalized bitangential problems.- References.- The development of some of V.P. Potapov's ideas. The geometric theory of operators in spaces with indefinite metric.- References.- On the Potapov theory of multiplicative representations.- References.- An operator approach to the Potapov scheme for the solution of interpolation problems.- I. Potapov's method of solution of interpolation problems.- 1. Some information from j-algebra.- 2. Nevanlinna-Pick problem.- 3. The Schur problem.- II. Operator identities and interpolation problems.- 1. Formulation of the problem.- 2. The fundamental matrix inequality.- 3. The transformed inequality.- 4. The solution of nondegenerate interpolation problems.- 5. Weyl discs.- 6. Degenerate interpolation problems and the method of regularization.- 7. Applications of the general theory.- References.- Description of a class of functions which admit an approximation by rational functions with preassigned poles I.- 2. The class PCNM of pseudocontinuable functions.- 3. The Smirnov class N*.- 4. The weighted space PCH (I+, I-) of pseudocontinuable meromorphic functions with prescribed denominators.- 5. G. Ts. Tumarkin's theorem on functions which admit weighted approximation by a sequence of rational functions with preassigned poles.- 6. Formulation of the main approximation theorem.- 7. A fundamental approximation Lemma.- References.- An analysis and extension of V.P. Potapov's approach to problems with applications to the generalized bi-tangential Schur-Nevanlinna-Pick problem and J-inner-outer factorization.- 1. Potapov's approach to the Nevanlinna-Pick problem.- 2. An analysis of Potapov's approach and the AIP.- 3. The abstract interpolation problem.- 4. The AIP and unitary extensions of an isometry.- 5. The generalized bi-tangential Schur-Nevanlinna-Pick (SNP) problem.- 6. Inner-outer factorization of J-contractive matrix-functions.- References.- On the theory of inverse problems for the canonical differential equation.- References.- Addendum.- Some properties of linear-fractional transformations and the harmonic mean of matrix functions.- References.- Modification of V.P. Potapov's scheme in the indefinite case.- 0. Introduction.- 1. Preliminaries.- 2. Basic propositions.- 3. Extensions of the operator S.- 4. Examples.- References.- Inverse problems for equations systems.- 1. Introduction.- 2. Existence theorems.- 3. Classical examples.- 4. Uniqueness theorems.- References.