This textbook is designed for students with at least one solid semester of abstract algebra,some linear algebra background, and no previous knowledge of module theory. Modulesand the Structure of Rings details the use of modules over a ring as a means of consideringthe structure of the ring itself--explaining the mathematics and "inductivereasoning" used in working on ring theory challenges and emphasizing modules insteadof rings.Stressing the inductive aspect of mathematical research underlying the formal deductivestyle of the literature, this volume offers vital background on current methods for solvinghard classification problems of algebraic structures. Written in an informal butcompletely rigorous style, Modules and the Structure of Rings clarifies sophisticatedproofs … avoids the formalism of category theory … aids independent study or seminarwork … and supplies end-of-chapter problems.This book serves as an excellent primary.text for upper-level undergraduate and graduatestudents in one-semester courses on ring or module theory-laying a foundation formore advanced study of homological algebra or module theory.
Part I: Fundamental Concepts Modules and Maps 1. The Ring as a Module over Itself Part II: Projectivity 2. Coproducts of Copies of R (Free Modules) 3. Direct Summands of Free Modules (Projective Modules) 4. Submodules of Free Modules 5. Factor Modules of Free Modules Part III: Injectivity 6. Enlarging Homomorphisms 7. Embedding Modules in Injective Modules 8. Injective Modules as a Class 9. Structure of Injective Modules Part IV: Countability 10. Finitely-Generated Modules 11. Countably-Generated Modules 12. Coproducts of Countably-Generated Modules 13. Projective Modules Part V: Rings and Modules of Quotients 14. Torsion and Torsion free Modules 15. The Module of Quotients 16. Rings of Quotients