An introduction to functional analysis
著者
書誌事項
An introduction to functional analysis
Cambridge University Press, 2020
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注記
Includes bibliographical references (p. 394-395) and index
内容説明・目次
内容説明
This accessible text covers key results in functional analysis that are essential for further study in the calculus of variations, analysis, dynamical systems, and the theory of partial differential equations. The treatment of Hilbert spaces covers the topics required to prove the Hilbert-Schmidt theorem, including orthonormal bases, the Riesz representation theorem, and the basics of spectral theory. The material on Banach spaces and their duals includes the Hahn-Banach theorem, the Krein-Milman theorem, and results based on the Baire category theorem, before culminating in a proof of sequential weak compactness in reflexive spaces. Arguments are presented in detail, and more than 200 fully-worked exercises are included to provide practice applying techniques and ideas beyond the major theorems. Familiarity with the basic theory of vector spaces and point-set topology is assumed, but knowledge of measure theory is not required, making this book ideal for upper undergraduate-level and beginning graduate-level courses.
目次
- Part I. Preliminaries: 1. Vector spaces and bases
- 2. Metric spaces
- Part II. Normed Linear Spaces: 3. Norms and normed spaces
- 4. Complete normed spaces
- 5. Finite-dimensional normed spaces
- 6. Spaces of continuous functions
- 7. Completions and the Lebesgue spaces Lp( )
- Part III. Hilbert Spaces: 8. Hilbert spaces
- 9. Orthonormal sets and orthonormal bases for Hilbert spaces
- 10. Closest points and approximation
- 11. Linear maps between normed spaces
- 12. Dual spaces and the Riesz representation theorem
- 13. The Hilbert adjoint of a linear operator
- 14. The spectrum of a bounded linear operator
- 15. Compact linear operators
- 16. The Hilbert-Schmidt theorem
- 17. Application: Sturm-Liouville problems
- Part IV. Banach Spaces: 18. Dual spaces of Banach spaces
- 19. The Hahn-Banach theorem
- 20. Some applications of the Hahn-Banach theorem
- 21. Convex subsets of Banach spaces
- 22. The principle of uniform boundedness
- 23. The open mapping, inverse mapping, and closed graph theorems
- 24. Spectral theory for compact operators
- 25. Unbounded operators on Hilbert spaces
- 26. Reflexive spaces
- 27. Weak and weak-* convergence
- Appendix A. Zorn's lemma
- Appendix B. Lebesgue integration
- Appendix C. The Banach-Alaoglu theorem
- Solutions to exercises
- References
- Index.
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