Spectral Theory of Hyponormal Operators

1. Front Matter

   Pages I-XIV

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2. Elementary Properties of Hyponormal Operators and Semi-Hyponormal Operators

   • Daoxing Xia

   Pages 1-26

3. Symbols

   • Daoxing Xia

   Pages 27-46

4. Singular Integral Models

   • Daoxing Xia

   Pages 47-79

5. Relations Between the Spectra of Semi-Hyponormal Operators and those of the General Polar Symbols

   • Daoxing Xia

   Pages 80-97

6. Mosaics and Characteristic Functions

   • Daoxing Xia

   Pages 98-126

7. Spectral Mapping

   • Daoxing Xia

   Pages 127-159

8. Pincus Principal Functions, Traces and Determinants

   • Daoxing Xia

   Pages 160-178

9. Back Matter

   Pages 179-242

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Spectral analysis of linear operators has always been one of the more active and important fields of operator theory, and of extensive interest to many operator theorists. Its devel­ opments usually are closely related to certain important problems in contemporary mathematics and physics. In the last 20 years, many new theories and interesting results have been discovered. Now, in this direction, the fields are perhaps wider and deeper than ever. This book is devoted to the study of hyponormal and semi-hyponormal operators. The main results we shall present are those of the author and his collaborators and colleagues, as well as some concerning related topics. To some extent, hyponormal and semi-hyponormal opera­ tors are "close" to normal ones. Although those two classes of operators contain normal operators as a subclass, what we are interested in are, naturally, nonnormal operators in those classes. With the well-studied normal operators in hand, we cer­ tainly wish to know the properties of hyponormal and semi-hypo­ normal operators which resemble those of normal operators. But more important than that, the investigations should be concen­ trated on the phenomena which only occur in the nonnormal cases.

• mathematics
• Natural
• operator
• operator theory
• spectral theory

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