| Preface | 7 |
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| Contents | 9 |
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| Hilbert Space Preliminaries | 11 |
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| 1.1 Normed Linear Spaces | 12 |
| 1.2 Orthogonality | 20 |
| 1.3 Hilbert Space Geometry | 22 |
| 1.4 Linear Functionals | 25 |
| 1.5 Orthonormal Bases | 29 |
| 1.6 Exercises | 33 |
| Operator Theory Basics | 40 |
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| 2.1 Bounded Linear Operators | 40 |
| 2.2 Adjoints of Hilbert Space Operators | 43 |
| 2.3 Adjoints of Banach Space Operators | 50 |
| 2.4 Exercises | 52 |
| The Big Three | 57 |
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| 3.1 The HahnÒBanach Theorem | 58 |
| 3.2 Principle of Uniform Boundedness | 63 |
| 3.3 Open Mapping and Closed Graph Theorems | 69 |
| 3.4 Quotient Spaces | 74 |
| 3.5 Banach and the Scottish Caf ï e | 75 |
| 3.6 Exercises | 76 |
| Compact Operators | 85 |
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| 4.1 Finite-Dimensional Spaces | 85 |
| 4.2 Compact Operators | 88 |
| 4.3 A Preliminary Spectral Theorem | 95 |
| 4.4 The Invariant Subspace Problem | 102 |
| 4.5 Introduction to the Spectrum | 104 |
| 4.6 The Fredholm Alternative | 107 |
| 4.7 Exercises | 109 |
| Banach and C*- Algebras | 114 |
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| 5.1 First Examples | 115 |
| 5.2 Results on Spectra | 117 |
| 5.3 Ideals and Homomorphisms | 127 |
| 5.4 Commutative Banach Algebras | 131 |
| 5.5 Weak Topologies | 134 |
| 5.6 The Gelfand Transform | 139 |
| 5.7 The Continuous Functional Calculus | 147 |
| 5.8 Fredholm Operators | 150 |
| 5.9 Exercises | 153 |
| The Spectral Theorem | 163 |
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| 6.1 Normal Operators Are Multiplication Operators | 163 |
| 6.2 Spectral Measures | 171 |
| 6.3 Exercises | 189 |
| Real Analysis Topics | 193 |
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| A.1 Measures | 193 |
| A.2 Integration | 196 |
| A.3 Lp Spaces | 202 |
| A.4 The StoneÒWeierstrass Theorem | 203 |
| A.5 Positive Linear Functionals on C( X) | 204 |
| References | 206 |
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| Index | 208 |