算子理論是現(xiàn)代數(shù)學(xué)的許多重要領(lǐng)域的重要組成部分,這些領(lǐng)域包括:泛函分析、微分方程、指標(biāo)理論、表示論和數(shù)學(xué)物理等等。本書內(nèi)容涵蓋算子理論的中心課題,并以極好的清晰度和風(fēng)格進(jìn)行講述,使讀者可以聯(lián)想到 Conway 的寫作風(fēng)格。 前面幾章介紹并回顧了C -代數(shù)、正規(guī)算子、緊算子和非緊算子。部分主要論題包含了譜理論、泛函演算和 Fredholm 指標(biāo)。另外,還論述了算子理論和解析函數(shù)間某些深刻的聯(lián)系。 后面幾章講述了更高級(jí)的專題,包括了諸如 C -代數(shù)的表示、緊微擾和 von Neumann 代數(shù)。同樣講述了諸如 Sz.-Nagy 伸縮定理、Weyl-Fredholm 定理和 von Neumann 代數(shù)分類等重要結(jié)果,以及對(duì)Fredholm 理論的處理。最后一章介紹了自返子空間,它連同超自反空間是非對(duì)稱代數(shù)的現(xiàn)代研究中諸多成功的事件之一。
Preface
Chapter 1.Introduction to C*-Algebras
1.Definition and examples
2.Abelian C*-algebras and the Functional Calculus
3.The positive elements in a C*-algebra
4.Approximate identities
5.Ideals in a C*-algebra
6.Representations of a C*-algebra
7.Positive linear functionals and the GNS construction
Chapter 2.Normal Operators
8.Some topologies on B(H)
9.Spectral measures
10.The Spectral Theorem
11.Star-cyclic normal operators
12.The commutant
13.Von Neumann algebras
14.Abelian von Neumann algebras
15.The functional calculus for normal operators
Chapter 3.Compact Operators
16.C*-algebras of compact operators
17.Ideals of operators
18.Trace class and Hilbert-Schmidt operators
19.The dual spaces of the compact operators and the trace class
20.The weak-star topology
21.Inflation and the topologies
Chapter 4.Some Non-Normal Operators
22.Algebras and lattices
23.Isometries
24.Unilateral and bilateral shifts
25.Some results on Hardy spaces
26.The functional calculus for the unilateral shift
27.Weighted shifts
28.The Volterra operator
29.Bergman operators
30.Subnormal operators
31.Essentially normal operators
Chapter 5.More on C*-Algebras
32.Irreducible representations
33.Positive maps
34.Completely positive maps
35.An application:Spectral sets and the Sz.-Nagy DilationTheorem
36.Quasicentral approximate identitites
Chapter 6.Compact Perturbations
37.Behavior of the spectrum under a compact perturbation
38.Bp perturbations of hermitian operators
39.The Weyl-von Neumann-Berg Theorem
40.Voiculescu's Theorem
41.Approximately equivalent representations
42.Some applications
Chapter 7.Introduction to Von Neumann Algebras
43.Elementary properties and examples
44.The Kaplansky Density Theorem
45.The Pedersen Up-Down Theorem
46.Normal homomorphisms and ideals
47.Equivalence of projections
48.Classification of projections
49.Properties of projections
50.The structure of Type I algebras
51.The classification of Type I algebras
52.Operator-valued measurable functions
53.Some structure theory for continuous algebras
54.Weak-star continuous linear functionals revisited
55.The center-valued trace
Chapter 8.Reflexivity
56.Fundamentals and examples
57.Reflexive operators on finite dimensional spaces
58.Hyperreflexive subspaces
59.Reflexivity and duality
60.Hypereflexive von Neumann algebras
61.Some examples of operators
Bibliography
Index
List of Symbols