Hopf algebras have been shown to play a natural role in studying questions of integral module structure in extensions of local or global fields. This book surve

Only book on Hopf algebras aimed at advanced undergraduates

This volume is devoted to the Brauer group of a commutative ring and related invariants. Part I presents a new self-contained exposition of the Brauer group of

This volume is based on talks given at the Workshop on Categorical Structures for Descent and Galois Theory, Hopf Algebras, and Semiabelian Categories held at T