In revising his undergraduate text, Koshy incorporates new sections and exercises dealing with the latest discoveries and reinvigorates the standards in number theory, as well. Elementary Number Theory is the only number theory text that shows the student how modular systems can be employed to create beautiful designs, tying the theory to both geometry and art. This text is ideal for undergraduate mathematics and computer science students, and any instructor teaching a course in number theory will find the content to be ideally suited for their current curricula.
The second edition of Elementary Number Theory features real-world applications of number theory, used in computer security and is the only text that covers barcodes, ZIP codes, ISBNs, EAN, and VIN. It is loaded with pedagogical features including many fully worked examples, graded exercises, chapter summaries, and computer exercises. This is a well-organized, non-intimidating book written with students in mind. Koshy also keeps the instructor in mind, allowing maximum flexibility in chapter selection based on the course length and students' needs.

Recensione

"This is the only number theory book to show how modular systems can be employed to create beautiful designs, thus linking number theory with both geometry and art. It is also the only number theory book to deal with bar codes, Zip coes, International Standard Book Numbers (ISBN), and European Article Numbers (EAN)...Each section provides a wealth of carefully prepared, well-graded examples and exercises to enahnce the readers' understanding and problem-solving skills."
-ZENTRALBLATT MATH

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