This text, now the 3rd edition, introduces students to the algebraic concepts of groups and rings, providing a comprehensive discussion of theory as well as a s... » 

This text, now the 3rd edition, introduces students to the algebraic concepts of groups and rings, providing a comprehensive discussion of theory as well as a significant number of applications. The text is rewritten and a new section on codes is included, also a new section classifying frieze groups in the plane. «