Elements of Functional Analysis

Prologue: Sequences.- 1 Countability.- 2 Separability.- 3 The Diagonal Procedure.- 4 Bounded Sequences of Continuous Linear Maps.- I Function Spaces and Their Duals.- 1 The Space of Continuous Functions on a Compact Set.- 1 Generalities.- 2 The Stone-Weierstrass Theorems.- 3 Ascoli's Theorem.- 2 Locally Compact Spaces and Radon Measures.- 1 Locally Compact Spaces.- 2 Daniell's Theorem.- 3 Positive Radon Measures.- 3A Positive Radon Measures on $${{\mathbb{R}}^{d}}
$$ and the Stieltjes Integral.- 3B Surface Measure on Spheres in $${{\mathbb{R}}^{d}}
$$.- 4 Real and Complex Radon Measures.- 3 Hilbert Spaces.- 1 Definitions, Elementary Properties, Examples.- 2 The Projection Theorem.- 3 The Riesz Representation Theorem.- 3A Continuous Linear Operators on a Hilbert Space.- 3B Weak Convergence in a Hilbert Space.- 4 Hilbert Bases.- 4 LpSpaces.- 1 Definitions and General Properties.- 2 Duality.- 3 Convolution.- II Operators.- 5 Spectra.- 1 Operators on Banach Spaces.- 2 Operators in Hilbert Spaces.- 2A Spectral Properties of Hermitian Operators.- 2B Operational Calculus on Hermitian Operators.- 6 Compact Operators.- 1 General Properties.- lA Spectral Properties of Compact Operators.- 2 Compact Selfadjoint Operators.- 2A Operational Calculus and the Fredholm Equation.- 2B Kernel Operators.- III Distributions.- 7 Definitions and Examples.- 1 Test Functions.- lA Notation.- 1B Convergence in Function Spaces.- 1C Smoothing.- 1D C?Partitions of Unity.- 2 Distributions.- 2A Definitions.- 2B First Examples.- 2C Restriction and Extension of a Distribution to an Open Set.- 2D Convergence of Sequences of Distributions.- 2E Principal Values.- 2F Finite Parts.- 3 Complements.- 3A Distributions of Finite Order.- 3B The Support of a Distribution.- 3C Distributions with Compact Support.- 8 Multiplication and Differentiation.- 1 Multiplication.- 2 Differentiation.- 3 Fundamental Solutions of a Differential Operator.- 3A The Laplacian.- 3B The Heat Operator.- 3C The Cauchy-Riemann Operator.- 9 Convolution of Distributions.- 1 Tensor Product of Distributions.- 2 Convolution of Distributions.- 2A Convolution in ??.- 2B Convolution in D?.- 2C Convolution of a Distribution with a Function.- 3 Applications.- 3A Primitives and Sobolev's Theorem.- 3B Regularity.- 3C Fundamental Solutions and Partial Differential Equations.- 3D The Algebra D+?.- 10 The Laplacian on an Open Set.- 1 The spaces H1(?) and H01(?).- 2 The Dirichlet Problem.- 2A The Dirichlet Problem.- 2B The Heat Problem.- 2C The Wave Problem.- Answers to the Exercises.