同调 pdf epub mobi txt 电子书 下载 2025

introduction .
chapter i. modules, diagrams, and functors
1. the arrow notation
2. modules
3. diagrams
4. direct sums
5. free and projective modules
6. the functor horn
7. categories
8. functors
chapter if. homology of complexes
1. differential groups
2. complexes
3. cohomology
4. the exact homology sequence
5. some diagram lemmas
6. additive relations
7. singular homology
8. homotopy
9. axioms for homology
.chapter iii. extensions and resolutions
1. extensions of modules
2. addition of extensions
3. obstructions to the extension of homomorphisms
4. the universal coefficient theorem for cohomology
5. composition of extensions
6. resolutions
7. injective modules
8. injective resolutions
9.two exact sequences for extn
10. axiomatic description of ext
11. the injective envelope
chapter iv. cohomol0gy of groups
1. the group ring
2. crossed homomorphisms
3. group extensions
4. factor sets
5. the bar resolution
6. the characteristic class of a group extension
7. cohomology of cyclic and free groups
8. obstructions to extensions
9. realization of obstructions
10. schur's theorem
11. spaces with operators
chapter v. tensor and torsion products
1. tensor products
2. modules over commutative rings
3. bimodules
4. dual modules
5. right exactness of tensor products .
6. torsion products of groups
7. torsion products of modules
8. torsion products by resolutions
9. the tensor product of complexes
10. the konneth formula
11. universal coefficient theorems
chapter vi. types of algebras
1. algebras by diagrams
2. graded modules
3. graded algebras
4. tensor products of algebras
5. modules over algebras
6. cohomology of free abelian groups
7. differential graded algebras
8. identities on horn and
9.coalgebras and hopf algebras
chapter vii. dimension
1. homological dimension
2. dimensions in polynomial rings
3. ext and tor for algebras
4. global dimensions of polynomial rings ..
5. separable algebras
6. graded syzygies
7. local rings
chapter viii. products
1. homology products
2. the torsion product of algebras
3. a diagram lemma
4. external products for ext
5. simplicial objects
6. normalization
7. acyclic models
8. the eilenberg-zilber theorem
9. cup products
chapter ix. relative homological algebra
1. additive categories
2. abelian categories
3. categories of diagrams
4. comparison of allowable resolutions
5. relative abelian categories
6. relative resolutions
7. the categorical bar resolution
8. relative torsion products
9. direct products of rings
chapter x. cohomology of algebraic systems
1. introduction
2. the bar resolution for algebras
3. the cohomology of an algebra
4. the homology of an algebra
5. homology of groups and monoids
6. ground ring extensions and direct products
7. homology of tensor products
8. the case of graded algebras
9. complexes of complexes
10. resolutions and constructions
11. two-stage cohomology of dga-algebras
12. cohomology of commutative dga-algebras
13. homology of algebraic systems
chapter xi. spectral sequences
1. spectral sequences
2. fiber spaces
3. filtered modules
4. transgression
5. exact couples
6. bicomplexes
7. the spectral sequence of a covering
8. cohomology spectral sequences
9. restriction, inflation, and connection
10. the lyndon spectral sequence
11. the comparison theorem
chapter xii. derived functors
1. squares
2. subobjects and quotient objects
3. diagram chasing
4. proper exact sequences
5. ext without projectives
6. the category of short exact sequences
7. connected pairs of additive functors
8. connected sequences of functors
9. derived functors
10. products by universality
11. proper projective complexes
12. the spectral kunneth formula
bibliography
list of standard symbols
index ...
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