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The exposition of the classical theory of algebraic numbers is clear and thorough, and there is a large number of exercises as well as worked out numerical examples. A careful study of this book will provide a solid background to the learning of more recent topics.

Reviewing the concepts of principal ideal domains and commutative fields, this book discusses residue classes; quadratic residues; algebraic integers, their discriminant; decomposition, norm, and classes of ideals; the ramification index; and the fundamental theorem of Abelian extensions. It also includes many exercises and useful examples.