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An Invitation to C*-Algebras

An Invitation to C*-Algebras
Catalogue Information
Field name Details
Dewey Class 512
Title An Invitation to C*-Algebras ([EBook] /) / by William Arveson.
Author Arveson, William
Other name(s) SpringerLink (Online service)
Publication New York, NY : : Springer New York, , 1976.
Physical Details X, 108 p. : online resource.
Series Graduate texts in mathematics 0072-5285 ; ; 39
ISBN 9781461263715
Summary Note This book gives an introduction to C*-algebras and their representations on Hilbert spaces. We have tried to present only what we believe are the most basic ideas, as simply and concretely as we could. So whenever it is convenient (and it usually is), Hilbert spaces become separable and C*-algebras become GCR. This practice probably creates an impression that nothing of value is known about other C*-algebras. Of course that is not true. But insofar as representations are conĀ­ cerned, we can point to the empirical fact that to this day no one has given a concrete parametric description of even the irreducible representations of any C*-algebra which is not GCR. Indeed, there is metamathematical evidence which strongly suggests that no one ever will (see the discussion at the end of Section 3. 4). Occasionally, when the idea behind the proof of a general theorem is exposed very clearly in a special case, we prove only the special case and relegate generalizations to the exercises. In effect, we have systematically eschewed the Bourbaki tradition. We have also tried to take into account the interests of a variety of readers. For example, the multiplicity theory for normal operators is contained in Sections 2. 1 and 2. 2. (it would be desirable but not necessary to include Section 1. 1 as well), whereas someone interested in Borel structures could read Chapter 3 separately. Chapter I could be used as a bare-bones introduction to C*-algebras. Sections 2.:
Contents note 1 Fundamentals -- 1.1. Operators and C*-algebras -- 1.2. Two density theorems -- 1.3. Ideals, quotients, and representations -- 1.4. C*-algebras of compact operators -- 1.5. CCR and GCR algebras -- 1.6. States and the GNS construction -- 1.7. The existence of representations -- 1.8. Order and approximate units -- 2 Multiplicity Theory -- 2.1. From type I to multiplicity-free -- 2.2. Commutative C*-algebras and normal operators -- 2.3. An application: type I von Neumann algebras -- 2.4. GCR algebras are type I -- 3 Borel Structures -- 3.1. Polish spaces -- 3.2. Borel sets and analytic sets -- 3.3. Borel spaces -- 3.4. Cross sections -- 4 From Commutative Algebras to GCR Algebras -- 4.1. The spectrum of a C*-algebra -- 4.2. Decomposable operator algebras -- 4.3. Representations of GCR algebras.
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