Complex Analysis

D. H. Luecking

ISBN 10: 0387909931 / ISBN 13: 9780387909936

Editore: Springer, Copernicus Mai 1984, 1984

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This item is printed on demand - Print on Demand Titel. Neuware -The main idea of this book is to present a good portion of the standard material on functions of a complex variable, as well as some new material, from the point of view of functional analysis. The main object of study is the algebra H(G) of all holomorphic functions on the open set G, with the topology on H(G) of uniform convergence on compact subsets of G. From this point of vie~, the main theorem of the theory is Theorem 9.5, which concretely identifies the dual of H(G) with the space of germs of holomorphic functions on the complement of G. From this result, for example, Runge's approximation theorem and the global Cauchy integral theorem follow in a few short steps. Other consequences of this duality theorem are the Germay interpolation theorem and the Mittag-Leffler Theorem. The approach via duality is entirely consistent with Cauchy's approach to complex variables, since curvilinear integrals are typical examples of linear functionals. The prerequisite for the book is a one-semester course in com plex variables at the undergraduate-graduate level, so that the elements of the local theory are supposed known. In particular, the Cauchy Theorem for the square and the circle are assumed, but not the global Cauchy Theorem in any of its forms. The second author has three times taught a graduate course based on this material at the University of Illinois, with good results.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 188 pp. Englisch.

Codice articolo 9780387909936

Dati bibliografici

• Titolo: Complex Analysis
• Editore: Springer, Copernicus Mai 1984
• Data di pubblicazione: 1984
• Lingua: Inglese
• ISBN 10: 0387909931
• ISBN 13: 9780387909936
• Rilegatura: Taschenbuch
• Condizione: Neu
• Dimensioni: 235 L x 155 A x 11 P (millimetri) 235 millimetri di larghezza per 155 millimetri di altezza per 11 millimetri di profondità
• Peso: 295 grammi

Descrizione articolo

Riassunto

The main idea of this book is to present a good portion of the standard material on functions of a complex variable, as well as some new material, from the point of view of functional analysis. The main object of study is the algebra H(G) of all holomorphic functions on the open set G, with the topology on H(G) of uniform convergence on compact subsets of G. From this point of vie~, the main theorem of the theory is Theorem 9.5, which concretely identifies the dual of H(G) with the space of germs of holomorphic functions on the complement of G. From this result, for example, Runge's approximation theorem and the global Cauchy integral theorem follow in a few short steps. Other consequences of this duality theorem are the Germay interpolation theorem and the Mittag-Leffler Theorem. The approach via duality is entirely consistent with Cauchy's approach to complex variables, since curvilinear integrals are typical examples of linear functionals. The prerequisite for the book is a one-semester course in com­ plex variables at the undergraduate-graduate level, so that the elements of the local theory are supposed known. In particular, the Cauchy Theorem for the square and the circle are assumed, but not the global Cauchy Theorem in any of its forms. The second author has three times taught a graduate course based on this material at the University of Illinois, with good results.

Contenuti

1. Preliminaries: Set Theory and Topology.- 2. Preliminaries: Vector Spaces and Complex Variables.- 3. Properties of C(G) and H(G).- 4. More About C(G) and H(G).- 5. Duality.- 6. Duality of H(G) — The Case of the Unit Disc.- 7. The Hahn-Banach Theorem, and Applications.- 8. More Applications.- 9. The Dual of H(G).- 10. Runge’s Theorem.- 11. The Cauchy Theorem.- 12. Constructive Function Theory.- 13. Ideals in H(G).- 14. The Riemann Mapping Theorem.- 15. Carathéodory Kernels and Farrell’s Theorem.- 16. Ring (not Algebra) Isomorphisms of H(G).- 17. Dual Space Topologies.- 18. Interpolation.- 19. Gap-Interpolation Theorems.- 20. First-Order Conformal Invariants.- References.