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This book is an introduction to the theory of partial differential operators. It assumes that the reader has a knowledge of introductory functional analysis, up to the spectral theorem for bounded linear operators on Banach spaces. However, it describes the theory of Fourier transforms and distributions as far as is needed to analyse the spectrum of any constant coefficient partial differential operator. A completely new proof of the spectral theorem for unbounded self-adjoint operators is followed by its application to a variety of second-order elliptic differential operators, from those with discrete spectrum to Schrödinger operators acting on L2(RN). The book contains a detailed account of the application of variational methods to estimate the eigenvalues of operators with measurable coefficients defined by the use of quadratic form techniques. This book could be used either for self-study or as a course text, and aims to lead the reader to the more advanced literature on the subject.Read more
- Derives from courses given by the author
- Author is leading figure in this area
- Only book on this subject at this level
Reviews & endorsements
' … a new approach to the spectral theorem for self-adjoint unbounded operators … For readers with standard background in functional analysis and bounded operator theory the book can serve as a missing link to the more advanced literature.' Monatshefte für MathematikSee more reviews
' … a concise and nicely written introduction to many important areas of this vast mathematical discipline … This short book (180 pages) will be very useful both to students and researchers working in related areas of mathematics and physics.' European Mathematical Society
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- Date Published: October 1996
- format: Paperback
- isbn: 9780521587105
- length: 196 pages
- dimensions: 228 x 151 x 17 mm
- weight: 0.274kg
- availability: Available
Table of Contents
1. The fundamental ideas
2. The spectral theorem
3. Translation invariant operators
4. The variation methods
5. Further spectral results
6. Dirichlet boundary conditions
7. Neumann boundary conditions
8. Schrödinger operators.
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