Book:E.C. Titchmarsh/The Theory of Functions/Second Edition

E.C. Titchmarsh: The Theory of Functions (2nd Edition)

Published $\text {1939}$, Oxford University Press

ISBN 978-0-198-53349-8

Subject Matter

• Analysis

Contents

Chapter 1: Infinite Series, Products, and Integrals

1.1 Uniform convergence of series

1.2 Series of complex terms. Power series

1.3 Series which are not uniformly convergent

1.4 Infinite products

1.5 Infinite integrals

1.6 Double series

1.7 Integration of series

1.8 Repeated integrals. The Gamma-function

1.88 Differentiation of integrals

Chapter 2: Analytic Functions

2.1 Functions of a complex variable

2.2 The complex differential calculus

2.3 Complex integration. Cauchy's theorem

2.4 Cauchy's integral. Taylor's series

2.5 Cauchy's inequality. Liouville's thorem

2.6 The zeros of an analytic function

2.7 Laurent series. Singularities

2.8 Series and integrals of analytic functions

2.9 Remark on Laurent Series

Chapter 3: Residues, Contour Integration, Zeros

3.1 Residues. Contour integration

3.2 Meromorphic functions. Integral functions

3.3 Summation of certain series

3.4 Poles and zeros of a meromorphic function

3.5 The modulus, and real and imaginary parts, of an analytic function

3.6 Poisson's integral. Jensen's theorem

3.7 Carleman's theorem

3.8 A theorem of Littlewood

Chapter 4: Analytic Continuation

4.1 General theory

4.2 Singularities

4.3 Riemann surfaces

4.4 Functions denned by integrals. The Gamma-function. The Zeta-function

4.5 The principle of reflection

4.6 Hadamard's multiplication theorem

4.7 Functions with natural boundaries

Chapter 5: The Maximum-Modulus Theorem

5.1 The maximum-modulus theorem

5.2 Schwarz's theorem. Vitali's theorem. Montel's theorem

5.3 Hadamard's three-circles theorem

5.4 Mean values of $\left\vert{f \left({z}\right)}\right\vert$

5.5 The Borel-Carathedory inequality

5.6 The Phragmen-Lindelof theorems

5.7 The Phragmen-Lindelof function $h \left({0}\right)$

5.8 Applications

Chapter 6: Conformal Representation

6.1 General theory

6.2 Linear transmormations

6.3 Various transformations

6.4 Simple (schlicht) functions

6.5 Application of the principle of reflection

6.6 Representation of a polygon on a half-plane

6.7 General existence theorems

6.8 Further properties of simple functions

Chapter 7: Power Series with a Finite Radius of Convergence

7.1 The circle of convergence

7.2 Position of the singularities

7.3 Convergence of the series and regularity of the function

7.4 Over-convergence. Gap theorems

7.5 Asymptotic behaviour near the circle of convergence

7.6 Abel's theorem and its converse

7.7 Partial sums of a power series

7.8 The zeros of partial sums

Chapter 8: Integral Functions

8.1 Factorization of integral functions

8.2 Functions of finite order

8.3 The coefficients in the power series

8.4 Examples

8.5 The derived function

8.6 Functions with real zeros only

8.7 The minimum modulus

8.8 The a-points of an integral function. Picard's theorem

8.9 Meromorphic functions

Chapter 9: Dirichlet Series

9.1 Introduction. Convergence. Absolute convergence

9.2 Convergence of the series and regularity of the function

9.3 Asymptotic behaviour

9.4 Functions of finite order

9.5 The mean-value formula and half-plane

9.6 The uniqueness theorem. Zeros

9.7 Representation of functions by Dirichlet series

Chapter 10: The Theory of Measure and the Lebesgue Integral

10.1 Riemann integration

10.2 Sets of points. Measure

10.3 Measurable functions

10.4 The Lebesgue integral of a bounded function

10.5 Bounded convergence

10.6 Comparison between Riemann and Lebesgue integrals

10.7 The Lebesgue integral of an unbounded function

10.8 General convergence theorems

10.9 Integrals over an infinite range

Chapter 11: Differentiation and Integration

11.1 Introduction

11.2 Differentiation throughout an interval. Non-differentiable functions

11.3 The four derivates of a function

11.4 Functions of bounded variation

11.5 Integrals

11.6 The Lebesgue set

11.7 Absolutely continuous functions

11.8 Integration of a differential coefficient

Chapter 12: Further Theorems on Lebesgue Integration

12.1 Integration by parts

12.2 Approximation to an integrable function. Change of the independent variable

12.3 The second mean-value theorem

12.4 The Lebesgue class $L^p$

12.5 Mean convergence

12.6 Repeated integrals

Chapter 13: Fourier Series

13.1 Trigonometrical series and Fourier series

13.2 Dirichlet's integral. Convergence tests

13.3 Summation by arithmetic means

13.4 Continuous functions with divergent Fourier series

13.5 Integration of Fourier series. Parseval's theorem

13.6 Functions of the class L*. Bessel's inequality. The Riesz-Fischer theorem

13.7 Properties of Fourier coefficients

13.8 Uniqueness of trigonometrical series

13.9 Fourier integrals

Bibliography

General Index