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Algebraic Number Theory


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Table of Contents

Integral Domains, Ideals, and Unique Factorization
Integral Domains
Factorization Domains
Noetherian and Principal Ideal Domains
Dedekind Domains
Algebraic Numbers and Number Fields
Quadratic Fields

Field Extensions
Automorphisms, Fixed Points, and Galois Groups
Norms and Traces
Integral Bases and Discriminants
Norms of Ideals

Class Groups
Binary Quadratic Forms
Forms and Ideals
Geometry of Numbers and the Ideal Class Group
Units in Number Rings
Dirichlet's Unit Theorem

Applications: Equations and Sieves
Prime Power Representation
Bachet's Equation
The Fermat Equation
The Number Field Sieve

Ideal Decomposition in Number Fields
Inertia, Ramification, and Splitting of Prime Ideals
The Different and Discriminant
Galois Theory and Decomposition
Kummer Extensions and Class-Field Theory
The Kronecker-Weber Theorem
An Application-Primality Testing

Reciprocity Laws
Cubic Reciprocity
The Biquadratic Reciprocity Law
The Stickelberger Relation
The Eisenstein Reciprocity Law

Appendix A: Abstract Algebra
Appendix B: Sequences and Series
Appendix C: The Greek Alphabet
Appendix D: Latin Phrases


Solutions to Odd-Numbered Exercises


About the Author

Richard A. Mollin is a professor in the Department of Mathematics and Statistics at the University of Calgary. In the past twenty-five years, Dr. Mollin has founded the Canadian Number Theory Association and has been awarded six Killam Resident Fellowships. He has written more than 200 publications, including Advanced Number Theory with Applications (CRC Press, August 2009), Fundamental Number Theory with Applications, Second Edition (CRC Press, February 2008), An Introduction to Cryptography, Second Edition (CRC Press, September 2006), Codes: The Guide to Secrecy from Ancient to Modern Times (CRC Press, May 2005), and RSA and Public-Key Cryptography (CRC Press, November 2002).


This is an introductory text in algebraic number theory that has good coverage ! . This second edition is completely reorganized and rewritten from the first edition. ! Very Good Features: (1) The applications are not limited to Diophantine equations, as in many books, but cover a wide range, including factorization into primes, primality testing, and the higher reciprocity laws. (2) The book has a large number of mini-biographies of the number theorists whose work is being discussed. ! --MAA Reviews, April 2011 This book is in the MAA's basic library list. The Basic Library List Committee considers this book essential for undergraduate mathematics libraries. Praise for the First Edition This is a remarkable book that will be a valuable reference for many people, including me. The book shows great care in preparation, and the ample details and motivation will be appreciated by lots of students. The solid punches at the end of each chapter will be appreciated by everybody. It deserves success with many adoptions as a text. --Irving Kaplansky, Mathematical Sciences Research Institute, Berkeley, California, USA An extremely well-written and clear presentation of algebraic number theory suitable for beginning graduate students. The many exercises, applications, and references are a very valuable feature of the book. --Kenneth Williams, Carleton University, Ottawa, Ontario, Canada This is a unique book that will be influential. --John Brillhart, University of Arizona, Tucson, USA

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