Introduction to Operator Theory and Invariant Subspaces

Released on by B. Beauzamy
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  • Introduction to Operator Theory and Invariant Subspaces Book Detail

  • Author : B. Beauzamy
  • Release Date : 1988-10-01
  • Publisher : Elsevier
  • Genre : Mathematics
  • Pages : 373
  • ISBN 13 : 0080960898
  • File Size : 13,13 MB
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Introduction to Operator Theory and Invariant Subspaces by B. Beauzamy PDF Summary

Book Description: This monograph only requires of the reader a basic knowledge of classical analysis: measure theory, analytic functions, Hilbert spaces, functional analysis. The book is self-contained, except for a few technical tools, for which precise references are given. Part I starts with finite-dimensional spaces and general spectral theory. But very soon (Chapter III), new material is presented, leading to new directions for research. Open questions are mentioned here. Part II concerns compactness and its applications, not only spectral theory for compact operators (Invariant Subspaces and Lomonossov's Theorem) but also duality between the space of nuclear operators and the space of all operators on a Hilbert space, a result which is seldom presented. Part III contains Algebra Techniques: Gelfand's Theory, and application to Normal Operators. Here again, directions for research are indicated. Part IV deals with analytic functions, and contains a few new developments. A simplified, operator-oriented, version is presented. Part V presents dilations and extensions: Nagy-Foias dilation theory, and the author's work about C1-contractions. Part VI deals with the Invariant Subspace Problem, with positive results and counter-examples. In general, much new material is presented. On the Invariant Subspace Problem, the level of research is reached, both in the positive and negative directions.

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Invariant Subspaces and Other Topics

Invariant Subspaces and Other Topics

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The annual Operator Theory conferences in Timigoara are conceived as a means to promote cooperation and exchange of in formation between specialists in all area

Invariant Subspaces

Invariant Subspaces

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In recent years there has been a large amount of work on invariant subspaces, motivated by interest in the structure of non-self-adjoint of the results have bee