ISBN13: 978-0321237071

ISBN10: 0321237072

Cover type:

Edition/Copyright: 5TH 05

Publisher: Addison-Wesley Longman, Inc.

Published: 2005

International: No

ISBN10: 0321237072

Cover type:

Edition/Copyright: 5TH 05

Publisher: Addison-Wesley Longman, Inc.

Published: 2005

International: No

USED

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Elementary Number Theory and Its Applications is noted for its outstanding exercise sets, including basic exercises, exercises designed to help students explore key concepts, and challenging exercises. Computational exercises and computer projects are also provided. In addition to years of use and professor feedback, the fifth edition of this text has been thoroughly checked to ensure the quality and accuracy of the mathematical content and the exercises.

The blending of classical theory with modern applications is a hallmark feature of the text. The Fifth Edition builds on this strength with new examples and exercises, additional applications and increased cryptology coverage. The author devotes a great deal of attention to making this new edition up-to-date, incorporating new results and discoveries in number theory made in the past few years.

**1. The Integers. **

Numbers and Sequences.

Sums and Products.

Mathematical Induction.

The Fibonacci Numbers.

**2. Integer Representations and Operations. **

Representations of Integers.

Computer Operations with Integers.

Complexity of Integer Operations.

**3. Primes and Greatest Common Divisors. **

Prime Numbers.

The Distribution of Primes.

Greatest Common Divisors.

The Euclidean Algorithm.

The Fundemental Theorem of Arithmetic.

Factorization Methods and Fermat Numbers.

Linear Diophantine Equations.

**4. Congruences. **

Introduction to Congruences.

Linear Congrences.

The Chinese Remainder Theorem.

Solving Polynomial Congruences.

Systems of Linear Congruences.

Factoring Using the Pollard Rho Method.

**5. Applications of Congruences. **

Divisibility Tests.

The perpetual Calendar.

Round Robin Tournaments.

Hashing Functions.

Check Digits.

**6. Some Special Congruences. **

Wilson's Theorem and Fermat's Little Theorem.

Pseudoprimes.

Euler's Theorem.

**7. Multiplicative Functions. **

The Euler Phi-Function.

The Sum and Number of Divisors.

Perfect Numbers and Mersenne Primes.

Mobius Inversion.

**8. Cryptology. **

Character Ciphers.

Block and Stream Ciphers.

Exponentiation Ciphers.

Knapsack Ciphers.

Cryptographic Protocols and Applications.

**9. Primitive Roots. **

The Order of an Integer and Primitive Roots.

Primitive Roots for Primes.

The Existence of Primitive Roots.

Index Arithmetic.

Primality Tests Using Orders of Integers and Primitive Roots.

Universal Exponents.

**10. Applications of Primitive Roots and the Order of an Integer. **

Pseudorandom Numbers.

The EIGamal Cryptosystem.

An Application to the Splicing of Telephone Cables.

**11. Quadratic Residues. **

Quadratic Residues and nonresidues.

The Law of Quadratic Reciprocity.

The Jacobi Symbol.

Euler Pseudoprimes.

Zero-Knowledge Proofs.

**12. Decimal Fractions and Continued. **

Decimal Fractions.

Finite Continued Fractions.

Infinite Continued Fractions.

Periodic Continued Fractions.

Factoring Using Continued Fractions.

**13. Some Nonlinear Diophantine Equations. **Pythagorean Triples.

Fermat's Last Theorem.

Sums of Squares.

Pell's Equation.

**14. The Gaussian Integers. **

Gaussian Primes.

Unique Factorization of Gaussian Integers.

Gaussian Integers and Sums of Squares.

ISBN10: 0321237072

Cover type:

Edition/Copyright: 5TH 05

Publisher: Addison-Wesley Longman, Inc.

Published: 2005

International: No

Elementary Number Theory and Its Applications is noted for its outstanding exercise sets, including basic exercises, exercises designed to help students explore key concepts, and challenging exercises. Computational exercises and computer projects are also provided. In addition to years of use and professor feedback, the fifth edition of this text has been thoroughly checked to ensure the quality and accuracy of the mathematical content and the exercises.

The blending of classical theory with modern applications is a hallmark feature of the text. The Fifth Edition builds on this strength with new examples and exercises, additional applications and increased cryptology coverage. The author devotes a great deal of attention to making this new edition up-to-date, incorporating new results and discoveries in number theory made in the past few years.

Table of Contents

**1. The Integers. **

Numbers and Sequences.

Sums and Products.

Mathematical Induction.

The Fibonacci Numbers.

**2. Integer Representations and Operations. **

Representations of Integers.

Computer Operations with Integers.

Complexity of Integer Operations.

**3. Primes and Greatest Common Divisors. **

Prime Numbers.

The Distribution of Primes.

Greatest Common Divisors.

The Euclidean Algorithm.

The Fundemental Theorem of Arithmetic.

Factorization Methods and Fermat Numbers.

Linear Diophantine Equations.

**4. Congruences. **

Introduction to Congruences.

Linear Congrences.

The Chinese Remainder Theorem.

Solving Polynomial Congruences.

Systems of Linear Congruences.

Factoring Using the Pollard Rho Method.

**5. Applications of Congruences. **

Divisibility Tests.

The perpetual Calendar.

Round Robin Tournaments.

Hashing Functions.

Check Digits.

**6. Some Special Congruences. **

Wilson's Theorem and Fermat's Little Theorem.

Pseudoprimes.

Euler's Theorem.

**7. Multiplicative Functions. **

The Euler Phi-Function.

The Sum and Number of Divisors.

Perfect Numbers and Mersenne Primes.

Mobius Inversion.

**8. Cryptology. **

Character Ciphers.

Block and Stream Ciphers.

Exponentiation Ciphers.

Knapsack Ciphers.

Cryptographic Protocols and Applications.

**9. Primitive Roots. **

The Order of an Integer and Primitive Roots.

Primitive Roots for Primes.

The Existence of Primitive Roots.

Index Arithmetic.

Primality Tests Using Orders of Integers and Primitive Roots.

Universal Exponents.

**10. Applications of Primitive Roots and the Order of an Integer. **

Pseudorandom Numbers.

The EIGamal Cryptosystem.

An Application to the Splicing of Telephone Cables.

**11. Quadratic Residues. **

Quadratic Residues and nonresidues.

The Law of Quadratic Reciprocity.

The Jacobi Symbol.

Euler Pseudoprimes.

Zero-Knowledge Proofs.

**12. Decimal Fractions and Continued. **

Decimal Fractions.

Finite Continued Fractions.

Infinite Continued Fractions.

Periodic Continued Fractions.

Factoring Using Continued Fractions.

**13. Some Nonlinear Diophantine Equations. **Pythagorean Triples.

Fermat's Last Theorem.

Sums of Squares.

Pell's Equation.

**14. The Gaussian Integers. **

Gaussian Primes.

Unique Factorization of Gaussian Integers.

Gaussian Integers and Sums of Squares.

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