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Elementary Number Theory [Paperback]

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Item description for Elementary Number Theory by Gareth A. Jones & J. Mary Jones...

This book gives an undergraduate-level introduction to Number Theory, with the emphasis on fully explained proofs and examples; exercises (with solutions) are integrated into the text. The first few chapters, covering divisibility, prime numbers and modular arithmetic, assume only basic school algebra, and are therefore suitable for first or second year students as an introduction to the methods of pure mathematics. Elementary ideas about groups and rings (summarised in an appendix) are then used to study groups of units, quadratic residues and arithmetic functions with applications to enumeration and cryptography. The final part, suitable for third-year students, uses ideas from algebra, analysis, calculus and geometry to study Dirichlet series and sums of squares; in particular, the last chapter gives a concise account of Fermat's Last Theorem, from its origin in the ancient Babylonian and Greek study of Pythagorean triples to its recent proof by Andrew Wiles.

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Item Specifications...

Pages   301
Est. Packaging Dimensions:   Length: 0.75" Width: 7" Height: 9.5"
Weight:   1.2 lbs.
Binding  Softcover
Release Date   Jul 31, 1998
Publisher   Springer
ISBN  3540761977  
ISBN13  9783540761976  

Availability  107 units.
Availability accurate as of Oct 23, 2016 03:58.
Usually ships within one to two business days from La Vergne, TN.
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More About Gareth A. Jones & J. Mary Jones

Register your artisan biography and upload your photo! Gareth A. Jones is Senior Lecturer in Development Geography, and Dennis Rodgers is Lecturer in Urban Development, both at the London School of Economics and Political Science.

Gareth A. Jones was born in 1964 and has an academic affiliation as follows - University of Strathclyde.

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Product Categories

1Books > Special Features > New & Used Textbooks
2Books > Subjects > Professional & Technical > Professional Science > Mathematics > Pure Mathematics > Number Theory
3Books > Subjects > Science > General
4Books > Subjects > Science > Mathematics > General
5Books > Subjects > Science > Mathematics > Pure Mathematics > Algebra > General
6Books > Subjects > Science > Mathematics > Pure Mathematics > Number Theory

Reviews - What do customers think about Elementary Number Theory?

Satisfied Customer  Jan 17, 2008
The book I ordered for a Christmas gift was received on time and was in perfect shape.
I Hate Number Theory  Aug 18, 2007
I hate number theory. Number theory is like the cement on your driveway. Real and Complex analysis are the Porsche and Ferrari you drive home every night. However, this is a great book, possibly the clearest and well written of books on the subject - it helped me tremendously with Rudin and Brown and Churchill. I still hate number theory.
If you are a beginner, this is the book  Jan 9, 2007
This book presumes so little of the reader that anyone can start learning number theory using this book. There are plenty of exercises and all of them have solutions. All the major topics are covered, and in a fashion and pace that allows you to grasp the underlying concepts. This book maintains accessibility and quality throughout. Highly recommended, particularly for beginners.
Excellent intro book on number theory  Dec 4, 2005
Ever since my undergraduate days aeons ago, I have always had an aversion to any number theory, but Jones and Jones have changed my mind completely. In the last year, I came across a few articles that made me want to learn more about the topic, but wasn't sure where to start, as I wanted a book that had proofs that I could follow, and yet also gave me some motivation to dive into more complicated mathematics such as elliptic curves. Elementary Number Theory fit the bill perfectly and has served as a wonderful introduction to the subject that I could follow and enjoy.

This book is the perfect blend of text and formulae for me, and seems an excellent combination of rigour and looseness, always trying to keep a steady pace for the reader without bogging down in pedantic details that are irrelevant to any but the most fastidious of readers. At the same time, the authors also ensure that the reader gains an appreciation of actually proving theorems about numbers, instead of relying on mere intuition or hunches.

As mentioned by other reviews here, the authors have included complete solutions to all of the exercises, which are sprinkled throughout each chapter, as well as at the end of each chapter. This is a welcome change to so many math texts that have "exercises left to the reader," and has been a requirement for me when reading a text in an unfamiliar subject. The exercises are selected appropriately to the content of the chapters and I found them to be a welcome complement to the rest of the book.

In addition, the book discusses applications of number theory to cryptography in a very readable fashion, with any additional mathematics required for the book (in this case some simple group theory and analysis) in two appendices. A book on number theory would also be incomplete without at least a brief discussion of Andrew Wiles and Fermat's Last Theorem. Of course, Elementary Number Theory steps up to the plate appropriately and gives an overview of the history of the theorem and a (necessarily) thin overview of Wiles' proof.

I think, however, one of the best features of the book is that Jones and Jones have attempted to make the text very readable, in the sense that you could sit in a bath and enjoy part of a chapter without any trouble. I have always enjoyed reading mathematics without pen and paper handy, mainly because it improves my memory and visualization when working through problems, and this text helps greatly in that regard. They do not go for the obscure, and realize that the people who are reading this text are doing so for the first time (hence the title) and will not be overly impressed if the authors had chosen to blind us with their brilliance. The authors understand that we are mere mortals with busy lives, and appreciate a smoothly flowing textbook without having to stumble through unique and cryptic notation or a difficult proof without any explanation.
Great buy for aspiring cryptographers  Apr 26, 2003
I bought this book while studying cryptography, a field that relies heavily on Number Theory for inspiration and from which it draws many, if not most, of its constructions. Most books on Cryptography summarily relegate the relevant number-theoretic aspects to short appendices that fail to build any intuition about what is going on. This book delivers precisely what is missing: a very readable, easily accessible introduction to the main topics of number theory that leaves the reader with a much better idea of how everything fits together. The book is very well suited for self-study, and includes answers to all exercises.

It should be noted, though, that the book does not address any of the computational aspects of Number Theory that are so dear to Cryptography (e.g it's easy to take square roots mod p if p is prime, hard to take square roots mod pq unless you know p,q). This, however, does not reduce its usefulness, since such results become very easy to absorb once one has a decent understanding of number theory and its workings. To fill the computational gaps, I would suggest Dana Angluin's "Lecture Notes on the Complexity of Some Problems in Number Theory" which are freely available on the web (the 2001 LaTeX'ed version)


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