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Real Analysis: A Constructive Approach

ISBN: 978-0-471-79230-7
320 pages
November 2006
Real Analysis: A Constructive Approach (0471792306) cover image
A unique approach to analysis that lets you apply mathematics across a range of subjects

This innovative text sets forth a thoroughly rigorous modern account of the theoretical underpinnings of calculus: continuity, differentiability, and convergence. Using a constructive approach, every proof of every result is direct and ultimately computationally verifiable. In particular, existence is never established by showing that the assumption of non-existence leads to a contradiction. The ultimate consequence of this method is that it makes sense—not just to math majors but also to students from all branches of the sciences.

The text begins with a construction of the real numbers beginning with the rationals, using interval arithmetic. This introduces readers to the reasoning and proof-writing skills necessary for doing and communicating mathematics, and it sets the foundation for the rest of the text, which includes:

  • Early use of the Completeness Theorem to prove a helpful Inverse Function Theorem
  • Sequences, limits and series, and the careful derivation of formulas and estimates for important functions
  • Emphasis on uniform continuity and its consequences, such as boundedness and the extension of uniformly continuous functions from dense subsets
  • Construction of the Riemann integral for functions uniformly continuous on an interval, and its extension to improper integrals
  • Differentiation, emphasizing the derivative as a function rather than a pointwise limit
  • Properties of sequences and series of continuous and differentiable functions
  • Fourier series and an introduction to more advanced ideas in functional analysis

Examples throughout the text demonstrate the application of new concepts. Readers can test their own skills with problems and projects ranging in difficulty from basic to challenging.

This book is designed mainly for an undergraduate course, and the author understands that many readers will not go on to more advanced pure mathematics. He therefore emphasizes an approach to mathematical analysis that can be applied across a range of subjects in engineering and the sciences.

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0 Preliminaries.

0.1 The Natural Numbers.

0.2 The Rationals.

1 The Real Numbers and Completeness.

1.0 Introduction.

1.1 Interval Arithmetic.

1.2 Families of Intersecting Intervals.

1.3 Fine Families.

1.4 Definition of the Reals.

1.5 Real Number Arithmetic.

1.6 Rational Approximations.

1.7 Real Intervals and Completeness.

1.8 Limits and Limiting Families.

Appendix: The Goldbach Number and Trichotomy.

2 An Inverse Function Theorem and its Application.

2.0 Introduction.

2.1 Functions and Inverses.

2.2 An Inverse Function Theorem.

2.3 The Exponential Function.

2.4 Natural Logs and the Euler Number.

3 Limits. Sequences and Series.

3.1 Sequences and Convergence.

3.2 Limits of Functions.

3.3 Series of Numbers.

Appendix I: Some Properties of Exp and Log.

Appendix 11: Rearrangements of Series.

4 Uniform Continuity.

4.1 Definitions and Elementary Properties.

4.2 Limits and Extensions.

Appendix I: Are there Non-Continuous Functions?

Appendix XI: Continuity of Double-Sided Inverses.

Appendix III: The Goldbach Function.

5 The Riemann Integral.

5.1 Definition and Existence.

5.2 Elementary Properties.

5.3 Extensions and Improper Integrals.

6 Differentiation.

6.1 Definitions and Basic Properties.

6.2 The Arithmetic of Differentiability.

6.3 Two Important Theorems.

6.4 Derivative Tools.

6.5 Integral Tools.

7 Sequences and Series of Functions.

7.1 Sequences of Functions.

7.2 Integrals and Derivatives of Sequences.

7.3 Power Series.

7.4 Taylor Series.

7.5 The Periodic Functions.

Appendix: Binomial Issues.

8 The Complex Numbers and Fourier Series.

8.0 Introduction.

8.1 The Complex Numbers C.

8.2 Complex Functions and Vectors.

8.3 Fourier Series Theory.



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MARK BRIDGER, PHD, is Associate Professor of Mathematics at Northeastern University in Boston, Massachusetts. The author of numerous journal articles, Dr. Bridger's research focuses on constructive analysis, the philosophy of science, and the use of technology in mathematics education.
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  • Offers an approach to introductory analysis with a constructive approach as opposed to the classical approach.  There is no comparable book on the market.
  • Constructivism proves a chain of results and shows, ultimately, that the quantity can be constructed.  This approach is gaining appreciation as an increasingly large number of computer science and related fields are encouraging a real analysis course for students.
  • Provides a unique look at the construction of real numbers as "consistent and fine families of rational intervals"
  • Includes hundreds of examples throughout the book, in all ranges of difficulty and length
  • Supplemented by a related web site that contains summaries of results with linked commentaries and references.  Also includes links to web sites containing supplementary material and historical background.
  • Authored with a friendly voice, the book encourages and helps readers to conquer difficult points.
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“The first chapters are presented at a very nice leisurely pace, which makes reading and learning enjoyable.” (Zentralblatt MATH, 2007)

"Very suitable for self-study by undergraduates at all levels..." (CHOICE, August 2007)

"...deserves to be read. Even if you do not subscribe to the constructive viewpoint, you'll learn something and find plenty of material to exploit in your classical analysis courses." (MAA Reviews, December 23, 2006)

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