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Preface Prologue: The Exponential Function Chapter 1 Abstract Integration 5 Set-theoretic notations and terminology 6 The concept of measurability 8 Simple functions 15 Elementary properties of measures 16 Arithmetic in [0, ¡Þ] 18 Integration of positive functions 19 Integration of complex functions 24 The role played by sets of measure zero 27 Exercises 31 Chapter 2 Positive Borel Measures 33 Vector spaces 33 Topological preliminaries 35 The Riesz representation theorem 40 Regularity properties of Borel measures 47 Lebesgue measure 49 Continuity properties of measurable functions 55 Exercises 57 Chapter 3 [WTBX]L[WTBZ]\+p-Spaces 61 Convex functions and inequalities 61 The [WTBX]L[WTBZ]\+p-spaces 65 Approximation by continuous functions 69 Exercises 71 Chapter 4 Elementary Hilbert Space Theory 76 Inner products and linear functionals 76 Orthonormal sets 82 Trigonometric series 88 Exercises 92 Chapter 5 Examples of Banach Space Techniques 95 Banach spaces 95 Consequences of Baire's theorem 97 Fourier series of continuous functions 100 Fourier coefficients of [WTBX]L[WTBZ]\+1-functions 103 The Hahn-Banach theorem 104 An abstract approach to the Poisson integral 108 Exercises 112 Chapter 6 Complex Measures 116 Total variation 116 Absolute continuity 120 Consequences of the Radon-Nikodym theorem 124 Bounded linear functionals on Lp 126 The Riesz representation theorem 129 Exercises 132 Chapter 7 Differentiation 135 Derivatives of measures 135 The fundamental theorem of Calculus 14~ Differentiable transformations 150 Exercises 156 Chapter 8 Integration on Product Spaces 160 Measurability on cartesian products 160 Product measures 163 The Fubini theorem 164 Completion of product measures 167 Convolutions 170 Distribution functions 172 Exercises 174 Chapter 9 Fourier Transforms 178 Formal properties 178 The inversion theorem 180 The Plancherel theorem 185 The Banach algebra [WTBX]L[WTBZ]\+1 190 Exercises 193 Chapter 10 Elementary Properties of Holomorphic Functions 196 Complex differentiation 196 Integration over paths