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\(J\) Contractive Matrix Functions, Reproducing Kernel Hilbert Spaces and Interpolation
Harry Dym
A co-publication of the AMS and CBMS.

CBMS Regional Conference Series in Mathematics
1989; 160 pp; softcover
Number: 71
ISBN-10: 0-8218-0722-6
ISBN-13: 978-0-8218-0722-4
List Price: US$29
Member Price: US$23.20
All Individuals: US$23.20
Order Code: CBMS/71
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This book evolved from a set of lectures presented under the auspices of the Conference Board of Mathematical Sciences at the Case Institute of Technology in September 1984. The original objective of the lectures was to present an introduction to the theory and applications of \(J\) inner matrices. However, in revising the lecture notes for publication, the author began to realize that the spaces \({\mathcal H}(U)\) and \({\mathcal H}(S)\) are ideal tools for treating a large class of matrix interpolation problems including ultimately two-sided tangential problems of both the Nevanlinna-Pick type and the Carathéodory-Fejér type, as well as mixtures of these. Consequently, the lecture notes were revised to bring \({\mathcal H}(U)\) and \({\mathcal H}(S)\) to center stage. This monograph is the first systematic exposition of the use of these spaces for interpolation problems.


Table of Contents

  • \(J\) inner functions
  • Reproducing kernel Hilbert spaces
  • Linear fractional transformations, matrix balls and more on admissibility
  • More on \(\mathcal H(U)\) spaces
  • The Nevanlinna-Pick problem
  • Carathéodory-Fejér interpolation
  • Singular Pick matrices
  • The lossless inverse scattering problem
  • Nehari interpolation
  • A matrix interpolation problem
  • Maximum entropy
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