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Threading Homology Through Algebra Selected Patterns

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ISBN-10: 0198524994

ISBN-13: 9780198524991

Edition: 2006

Authors: Giandomenico Boffi, David Buchsbaum

List price: $65.00
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Threading Homology through Algebra takes homological themes (Koszul complexes and their variations, resolutions in general) and shows how these affect the perception of certain problems in selected parts of algebra, as well as their success in solving a number of them. The text deals with regular local rings, depth-sensitive complexes, finite free resolutions, letter-place algebra, Schur and Weyl modules, Weyl-Schur complexes and determinantal ideals. Aimed at graduatesand academics in mathematics, the book provides an overview of the developments that have taken place in these areas as well as an insight into some of the open problems which exist.
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Book details

List price: $65.00
Copyright year: 2006
Publisher: Oxford University Press, Incorporated
Publication date: 8/24/2006
Binding: Hardcover
Pages: 272
Size: 6.14" wide x 9.21" long x 0.78" tall
Weight: 1.166
Language: English

Recollections and Perspectives
Factorization
Factorization domains
Polynomial and power series rings
Linear algebra
Free modules
Projective modules
Projective resolutions
Multilinear algebra
R[X[subscript 1],..., X[subscript t]] as a symmetric algebra
The divided power algebra
The exterior algebra
Local Ring Theory
Koszul complexes
Local rings
Hilbert-Samuel polynomials
Codimension and finitistic global dimension
Regular local rings
Unique factorization
Multiplicity
Intersection multiplicity and the homological conjectures
Generalized Koszul Complexes
A few standard complexes
The graded Koszul complex and its "derivatives"
Definitions of the hooks and their explicit bases
General setup
The fat complexes
Slimming down
Families of complexes
The "homothety homotopy"
Comparison of the fat and slim complexes
Depth-sensitivity of T(q; f)
Another kind of multiplicity
Structure Theorems for Finite Free Resolutions
Some criteria for exactness
The first structure theorem
Proof of the first structure theorem
Part (a)
Part (b)
The second structure theorem
Exactness Criteria at Work
Pfaffian ideals
Pfaffians
Resolution of a certain pfaffian ideal
Algebra structures on resolutions
Proof of Part 2 of Theorem V.1.8
Powers of pfaffian ideals
Intrinsic description of the matrix X
Hooks again
Some representation theory
A counting argument
Description of the resolutions
Proof of Theorem V.2.4
Weyl and Schur Modules
Shape matrices and tableaux
Shape matrices
Tableaux
Weyl and Schur modules associated to shape matrices
Letter-place algebra
Positive places and the divided power algebra
Negative places and the exterior algebra
The symmetric algebra (or negative letters and places)
Putting it all together
Place polarization maps and Capelli identities
Weyl and Schur maps revisited
Some kernel elements of Weyl and Schur maps
Tableaux, straightening, and the straight basis theorem
Tableaux for Weyl and Schur modules
Straightening tableaux
Taylor-made tableaux, or a straight-filling algorithm
Proof of linear independence of straight tableaux
Modifications for Schur modules
Duality
Weyl-Schur complexes
Some Applications of Weyl and Schur Modules
The fundamental exact sequence
Direct sums and filtrations for skew-shapes
Resolution of determinantal ideals
The Lascoux resolutions
The submaximal minors
Z-forms
Arithmetic considerations
Intertwining numbers
Z-forms again
Resolutions revisited; the Hashimoto counterexample
Resolutions of Weyl modules
The bar complex
The two-rowed case
A three-rowed example
Resolutions of skew-hooks
Comparison with the Lascoux resolutions
Appendix for Letter-Place Methods
Theorem VI.3.2, Part 1: the double standard tableaux generate
Theorem VI.3.2 Part 2: linear independence of double standard tableaux
Modifications required for Theorems VI.3.3 and VI.3.4
Modifications required for Theorem VI.8.4
References
Index