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An Introduction to Homological Algebra

An Introduction to Homological Algebra by Joseph Rotman
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With a wealth of examples as well as abundant applications to algebra, this is a must-read work: an easy-to-follow, step-by-step guide to homological algebra. The author provides a treatment of homological algebra which approaches the subject in terms of its origins in algebraic topology. In this brand new edition the text has been fully updated and revised throughout and new material on sheaves and abelian categories has been added.Applications include the following: to rings - Lazard's theorem that flat modules are direct limits of free modules, Hilbert's Syzygy Theorem, Quillen-Suslin's solution of Serre's problem about projectives over polynomial rings, and Serre-Auslander-Buchsbaum characterization of regular local rings (and a sketch of unique factorization); to groups - Schur-Zassenhaus, Gaschutz's theorem on outer automorphisms of finite p-groups, Schur multiplier, and cotorsion groups; and, to sheaves - sheaf cohomology, Cech cohomology, discussion of Riemann-Roch Theorem over compact Riemann surfaces.Learning homological algebra is a two-stage affair. Firstly, one must learn the language of Ext and Tor, and what this describes.
Springer; December 2008
721 pages; ISBN 9780387683249
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Title: An Introduction to Homological Algebra
Author: Joseph Rotman
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