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TitleTopics in Interpolation Theory [electronic resource] / edited by H. Dym, V. Katsnelson, B. Fritzsche, B. Kirstein
ImprintBasel : Birkhรคuser Basel : Imprint: Birkhรคuser, 1997
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Descript XXII, 498 p. online resource


About one half of the papers in this volume are based on lectures which were preยญ sented at a conference at Leipzig University in August 1994, which was dedicated to Vladimir Petrovich Potapov. He would have been eighty years old. These have been supplemented by: (1) Historical material, based on reminiscences of former colleagues, students and associates of V.P. Potapov. (2) Translations of a number of important papers (which serve to clarify the Potapov approach to problems of interpolation and extension, as well as a number of related problems and methods) and are relatively unknown in the West. (3) Two expository papers, which have been especially written for this volume. For purposes of discussion, it is convenient to group the technical papers in this volume into six categories. We will now run through them lightly, first listing the major theme, then in parentheses the authors of the relevant papers, followed by discussion. Some supplementary references are listed at the end; OT72 which appears frequently in this volume, refers to Volume 72 in the series Operator Theory: Advances and Applications. It was dedicated to V.P. Potapov. 1. Multiplicative decompositions (Yu.P. Ginzburg; M.S. Livsic, I.V. Mikhailova; V.I. Smirnov)


Vladimir Petrovich Potapov, as remembered by colleagues, friends and former students -- On a minimum problem in function theory and the number of roots of an algebraic equation inside the unit disc -- On tangential interpolation in reproducing kernel Hilbert modules and applications -- Notes on a Nevanlinna-Pick interpolation problem for generalized Nevanlinna functions -- The indefinite metric in the Schur interpolation problem for analytic functions, IV -- Bitangential interpolation for upper triangular operators -- Bitangential interpolation for upper triangular operators when the Pick operator is strictly positive -- Integral representations of a pair of nonnegative operators and interpolation problems in the Stieltjes class -- On recovering a multiplicative integral from its modulus -- On Schur functions and Szegรถ orthogonal polynomials -- Hilbert spaces of entire functions as a J theory subject -- On transformations of Potapovโ{128}{153}s fundamental matrix inequality -- An abstract interpolation problem and the extension theory of isometric operators -- On the theory of matrix-valued functions belonging to the Smirnov class -- Integral representation of function of class Ka -- On the theory of entire matrix-functions of exponential type -- Analogs of Nehari and Sarason theorems for character-automorphic functions and some related questions -- The Blaschke-Potapov factorization theorem and the theory of nonselfadjoint operators -- Weyl matrix circles as a tool for uniqueness in the theory of multiplicative representation of J-inner functions -- On a criterion of positive definiteness -- Matrix boundary value problems with eigenvalue dependent boundary conditions (The linear case) -- Weyl-Titchmarsh functions of the canonical periodical system of differential equations -- On boundary values of functions regular in a disk

Mathematics Functions of complex variables Mathematics Functions of a Complex Variable Mathematics general


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