Complete Normed Algebras (Ergebnisse der Mathematik und ihrer Grenzgebiete. 2. Folge, Band 80)
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The axioms of a complex Banach algebra were very happily chosen. They are simple enough to allow wide ranging fields of application, notably in harmonic analysis, operator theory and function algebras. At the same time they are tight enough to allow the development of a rich collection of results, mainly through the interplay of the elementary parts of the theories of analytic functions, rings, and Banach spaces. Many of the theorems are things of great beauty, simple in statement, surprising in content, and elegant in proof. We believe that some of them deserve to be known by every mathematician. The aim of this book is to give an account of the principal methods and results in the theory of Banach algebras, both commutative and non­ commutative. It has been necessary to apply certain exclusion principles in order to keep our task within bounds. Certain classes of concrete Banach algebras have a very rich literature, namely C*-algebras, function algebras, and group algebras. We have regarded these highly developed theories as falling outside our scope. We have not entirely avoided them, but have been concerned with their place in the general theory, and have stopped short of developing their special properties. For reasons of space and time we have omitted certain other topics which would quite naturally have been included, in particular the theories of multipliers and of extensions of Banach algebras, and the implications for Banach algebras of some of the standard algebraic conditions on rings. Hardcover, Label: Springer-Verlag, Springer-Verlag, Produktgruppe: Book, Publiziert: 1973-06, Studio: Springer-Verlag, Verkaufsrang: 12089270.

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AUSFÜHRLICHERE BESCHREIBUNG: The axioms of a complex Banach algebra were very happily chosen. They are simple enough to allow wide ranging fields of application, notably in harmonic analysis, operator theory and function algebras. At the same time they are tight enough to allow the development of a rich collection of results, mainly through the interplay of the elementary parts of the theories of analytic functions, rings, and Banach spaces. Many of the theorems are things of great beauty, simple in statement, surprising in content, and elegant in proof. We believe that some of them deserve to be known by every mathematician. The aim of this book is to give an account of the principal methods and results in the theory of Banach algebras, both commutative and non commutative. It has been necessary to apply certain exclusion principles in order to keep our task within bounds. Certain classes of concrete Banach algebras have a very rich literature, namely C -algebras, function algebras, and group algebras. We have regarded these highly developed theories as falling outside our scope. We have not entirely avoided them, but have been concerned with their place in the general theory, and have stopped short of developing their special properties. For reasons of space and time we have omitted certain other topics which would quite naturally have been included, in particular the theories of multipliers and of extensions of Banach algebras, and the implications for Banach algebras of some of the standard algebraic conditions on rings. INHALT: I. Concepts and Elementary Results.- 1. Normed Algebras.- 2. Inverses.- 3. Quasi-Inverses.- 4. Equivalent Norms.- 5. The Spectrum of an Element of a Complex Normed Algebra.- 6. Contour Integrals.- 7. A Functional Calculus for a Single Banach Algebra Element.- 8. Elementary Functions.- 9. Ideals and Modules.- 10. The Numerical Range of an Element of a Complex Normed Algebra.- 11. Approximate Identities.- 12. Involutions.- 13. The Complexification of a Real Algebra.- 14. Normed Division Algebras.- II. Commutativity.- 15. Commutative Subsets.- 16. Multiplicative Linear Functionals.- 17. The Gelfand Representation of a Commutative Banach Algebra.- 18. Derivations and Automorphisms.- 19. Generators and Joint Spectra.- 20. A Functional Calculus for Several Banach Algebra Elements.- 21. Functions Analytic on a Neighbourhood of the Carrier Space.- 22. The Shilov Boundary.- 23. The Hull-Kernel Topology.- III. Representation Theory.- 24. Algebraic Preliminaries.- 25. Irreducible Representations of Banach Algebras.- 26. The Structure Space of an Algebra.- 27. A-Module Pairings.- 28. The Dual Module of a Banach Algebra.- 29. The Representation of Linear Functionals.- IV. Minimal Ideals.- 30. Algebraic Preliminaries.- 31. Minimal Ideals in Complex Banach Algebras.- 32. Annihilator Algebras.- 33. Compact Action on Banach Algebras.- 34. H -Algebras.- V. Star Algebras.- 35. Commutative Banach Star Algebras.- 36. Continuity of the Involution.- 37. Star Representations and Positive Functionals.- 38. Characterizations of C -Algebras.- 39. B -Semi-Norms.- 40. Topologically Irreducible Star Representations.- 41. Hermitian Algebras.- VI. Cohomology.- 42. Tensor Products.- 43. Amenable Banach Algebras.- 44. Cohomology of Banach Algebras.- VII. Miscellany.- 45. Quasi-Algebraic Elements and Capacity.- 46. Nilpotents and Quasi-Nilpotents.- 47. Positiveness of the Spectrum.- 48. Type 0 Semi-Algebras.- 49. Locally Compact Semi-Algebras.- 50. Q-Algebras.- Index of Symbols. 2011, Taschenbuch / Paperback, Neuware, H: 229mm, B: 175mm, T: 18mm, 465g, 304, Internationaler Versand, Selbstabholung und Barzahlung, PayPal, offene Rechnung, Banküberweisung.

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Complete-Normed-Algebras~~F-F-Bonsall, Complete Normed Algebras, Hardcover.

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Springer, 2011-11-11. Paperback. Used:Good.

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Springer, 2011-11-11. Softcover reprint of the origina. Paperback. Good.

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Softcover, Softcover reprint of the original 1st ed. 1973.

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