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El. knyga: Local Cohomology: An Algebraic Introduction with Geometric Applications

(University of Sheffield), (Universität Zürich)

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This second edition of a successful graduate text provides a careful and detailed algebraic introduction to Grothendieck's local cohomology theory, including in multi-graded situations, and provides many illustrations of the theory in commutative algebra and in the geometry of quasi-affine and quasi-projective varieties. Topics covered include Serre's Affineness Criterion, the Lichtenbaum–Hartshorne Vanishing Theorem, Grothendieck's Finiteness Theorem and Faltings' Annihilator Theorem, local duality and canonical modules, the Fulton–Hansen Connectedness Theorem for projective varieties, and connections between local cohomology and both reductions of ideals and sheaf cohomology. The book is designed for graduate students who have some experience of basic commutative algebra and homological algebra and also experts in commutative algebra and algebraic geometry. Over 300 exercises are interspersed among the text; these range in difficulty from routine to challenging, and hints are provided for some of the more difficult ones.

On its original publication, this algebraic introduction to Grothendieck's local cohomology theory was the first book devoted solely to the topic and it has since become the standard reference for graduate students. This second edition has been thoroughly revised and updated to incorporate recent developments in the field.

Recenzijos

Review of the first edition: ' Brodmann and Sharp have produced an excellent book: it is clearly, carefully and enthusiastically written; it covers all important aspects and main uses of the subject; and it gives a thorough and well-rounded appreciation of the topic's geometric and algebraic interrelationships I am sure that this will be a standard text and reference book for years to come.' Liam O'Carroll, Bulletin of the London Mathematical Society Review of the first edition: 'The book is well organised, very nicely written, and reads very well a very good overview of local cohomology theory.' Newsletter of the European Mathematical Society Review of the first edition: ' a careful and detailed algebraic introduction to Grothendieck's local cohomology theory.' L'Enseignement Mathematique ' the book opens the view towards the beauty of local cohomology, not as an isolated subject but as a tool helpful in commutative algebra and algebraic geometry.' Zentralblatt MATH 'From the point of view of the reviewer (who learned all his basic knowledge about local cohomology reading the first edition of this book and doing some of its exercises), the changes previously described (the new Chapter 12 concerning canonical modules, the treatment of multigraded local cohomology, and the final new section of Chapter 20 about locally free sheaves) definitely make this second edition an even better graduate textbook than the first. Indeed, it is well written and, overall, almost self-contained, which is very important in a book addressed to graduate students.' Alberto F. Boix, Mathematical Reviews

Daugiau informacijos

This popular graduate text has been thoroughly revised and updated to incorporate recent developments in the field.
Preface to the First Edition page xi
Preface to the Second Edition xvii
Notation and conventions xxi
1 The local cohomology functors
1(15)
1.1 Torsion functors
1(2)
1.2 Local cohomology modules
3(7)
1.3 Connected sequences of functors
10(6)
2 Torsion modules and ideal transforms
16(31)
2.1 Torsion modules
17(4)
2.2 Ideal transforms and generalized ideal transforms
21(18)
2.3 Geometrical significance
39(8)
3 The Mayer-Vietoris sequence
47(18)
3.1 Comparison of systems of ideals
48(3)
3.2 Construction of the sequence
51(4)
3.3 Arithmetic rank
55(4)
3.4 Direct limits
59(6)
4 Change of rings
65(16)
4.1 Some acyclic modules
66(4)
4.2 The Independence Theorem
70(4)
4.3 The Flat Base Change Theorem
74(7)
5 Other approaches
81(25)
5.1 Use of Cech complexes
82(12)
5.2 Use of Koszul complexes
94(7)
5.3 Local cohomology in prime characteristic
101(5)
6 Fundamental vanishing theorems
106(29)
6.1 Grothendieck's Vanishing Theorem
107(5)
6.2 Connections with grade
112(5)
6.3 Exactness of ideal transforms
117(5)
6.4 An Affineness Criterion due to Serre
122(5)
6.5 Applications to local algebra in prime characteristic
127(8)
7 Artinian local cohomology modules
135(12)
7.1 Artinian modules
135(4)
7.2 Secondary representation
139(4)
7.3 The Non-vanishing Theorem again
143(4)
8 The Lichtenbaum-Hartshorne Theorem
147(17)
8.1 Preparatory lemmas
148(8)
8.2 The main theorem
156(8)
9 The Annihilator and Finiteness Theorems
164(29)
9.1 Finiteness dimensions
164(4)
9.2 Adjusted depths
168(3)
9.3 The first inequality
171(5)
9.4 The second inequality
176(7)
9.5 The main theorems
183(5)
9.6 Extensions
188(5)
10 Matlis duality
193(18)
10.1 Indecomposable injective modules
193(6)
10.2 Matlis duality
199(12)
11 Local duality
211(12)
11.1 Minimal injective resolutions
212(4)
11.2 Local Duality Theorems
216(7)
12 Canonical modules
223(28)
12.1 Definition and basic properties
224(14)
12.2 The endomorphism ring
238(7)
12.3 S2-ifications
245(6)
13 Foundations in the graded case
251(34)
13.1 Basic multi-graded commutative algebra
253(4)
13.2 *Injective modules
257(4)
13.3 The *restriction property
261(10)
13.4 The reconciliation
271(3)
13.5 Some examples and applications
274(11)
14 Graded versions of basic theorems
285(46)
14.1 Fundamental theorems
286(9)
14.2 *Indecomposable *injective modules
295(7)
14.3 A graded version of the Annihilator Theorem
302(7)
14.4 Graded local duality
309(4)
14.5 *Canonical modules
313(18)
15 Links with projective varieties
331(15)
15.1 Affine algebraic cones
331(5)
15.2 Projective varieties
336(10)
16 Castelnuovo regularity
346(18)
16.1 Finitely generated components
346(5)
16.2 The basics of Castelnuovo regularity
351(7)
16.3 Degrees of generators
358(6)
17 Hilbert polynomials
364(24)
17.1 The characteristic function
366(7)
17.2 The significance of reg2
373(5)
17.3 Bounds on reg2 in terms of Hilbert coefficients
378(5)
17.4 Bounds on reg1 and reg0
383(5)
18 Applications to reductions of ideals
388(17)
18.1 Reductions and integral closures
388(5)
18.2 The analytic spread
393(4)
18.3 Links with Castelnuovo regularity
397(8)
19 Connectivity in algebraic varieties
405(33)
19.1 The connectedness dimension
406(4)
19.2 Complete local rings and connectivity
410(6)
19.3 Some local dimensions
416(6)
19.4 Connectivity of affine algebraic cones
422(2)
19.5 Connectivity of projective varieties
424(2)
19.6 Connectivity of intersections
426(6)
19.7 The projective spectrum and connectedness
432(6)
20 Links with sheaf cohomology
438(42)
20.1 The Deligne Isomorphism
439(13)
20.2 The Graded Deligne Isomorphism
452(3)
20.3 Links with sheaf theory
455(10)
20.4 Applications to projective schemes
465(11)
20.5 Locally free sheaves
476(4)
References 480(5)
Index 485
M. P. Brodmann is Emeritus Professor in the Institute of Mathematics at the University of Zurich. R. Y. Sharp is Emeritus Professor of Pure Mathematics at the University of Sheffield.