(特价书)C*代数入门(英文影印版)

　　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 con-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. ...
　　

chapter 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
chapter 2 multiplicity theory
2.1.from type i to multiplicity-free
2.2.commutative c*-algebras and normal operators
2.3.an application: type !von neumann algebras
2.4.gcr algebras are type i
chapter 3 borel structures
3.1.polish spaces
3.2.borel sets and analytic sets
3.3.borei spaces
3.4.cross sections
chapter 4 from commutative algebras to gcr algebras