Auslander-Buchweitz Approximations of Equivariant Modules: (London Mathematical Society Lecture Note)

Series: London Mathematical Society Lecture Note

This book presents a new homological approximation theory in the category of equivariant modules, unifying the Cohen-Macaulay approximations in commutative ring theory and Ringel's theory of Delta-good approximations for quasi-hereditary algebras and reductive groups. The book provides a detailed introduction to homological algebra, commutative ring theory and homological theory of comodules of co