Sheaf Theory

ISBN-13: 9781461268543 / Angielski / Miękka / 2012 / 504 str.

Glen E. Bredon; Glen E. Bredon

Opis

This book is primarily concerned with the study of cohomology theories of general topological spaces with "general coefficient systems. " Sheaves play several roles in this study. For example, they provide a suitable notion of "general coefficient systems. " Moreover, they furnish us with a common method of defining various cohomology theories and of comparison between different cohomology theories. The parts of the theory of sheaves covered here are those areas impor- tant to algebraic topology. Sheaf theory is also important in other fields of mathematics, notably algebraic geometry, but that is outside the scope of the present book. Thus a more descriptive title for this book might have been Algebraic Topology from the Point of View of Sheaf Theory. Several innovations will be found in this book. Notably, the con- cept of the "tautness" of a subspace (an adaptation of an analogous no- tion of Spanier to sheaf-theoretic cohomology) is introduced and exploited throughout the book. The fact that sheaf-theoretic cohomology satisfies 1 the homotopy property is proved for general topological spaces. Also, relative cohomology is introduced into sheaf theory. Concerning relative cohomology, it should be noted that sheaf-theoretic cohomology is usually considered as a "single space" theory.

Spis treści

I Sheaves and Presheaves.- Definitions.- 2 Homomorphisms, subsheaves, and quotient sheaves.- 3 Direct and inverse images.- 4 Cohomomorphisms.- 5 Algebraic constructions.- 6 Supports.- 7 Classical cohomology theories.- Exercises.- II Sheaf Cohomology.- 1 Differential sheaves and resolutions.- 2 The canonical resolution and sheaf cohomology.- 3 Injective sheaves.- 4 Acyclic sheaves.- 5 Flabby sheaves.- 6 Connected sequences of functors.- 7 Axioms for cohomology and the cup product.- 8 Maps of spaces.- 9 ?-soft and ?-fine sheaves.- 10 Subspaces.- 11 The Vietoris mapping theorem and homotopy invariance.- 12 Relative cohomology.- 13 Mayer-Vietoris theorems.- 14 Continuity.- 15 The Künneth and universal coefficient theorems.- 16 Dimension.- 17 Local connectivity.- 18 Change of supports; local cohomology groups.- 19 The transfer homomorphism and the Smith sequences.- 20 Steenrod’s cyclic reduced powers.- 21 The Steenrod operations.- Exercises.- III Comparison with Other Cohomology Theories.- 1 Singular cohomology.- 2 Alexander-Spanier cohomology.- 3 de Rham cohomology.- 4 ?ech cohomology.- Exercises.- IV Applications of Spectral Sequences.- 1 The spectral sequence of a differential sheaf.- 2 The fundamental theorems of sheaves.- 3 Direct image relative to a support family.- 4 The Leray sheaf.- 5 Extension of a support family by a family on the base space.- 6 The Leray spectral sequence of a map.- 7 Fiber bundles.- 8 Dimension.- 9 The spectral sequences of Borel and Cartan.- 10 Characteristic classes.- 11 The spectral sequence of a filtered differential sheaf.- 12 The Fary spectral sequence.- 13 Sphere bundles with singularities.- 14 The Oliver transfer and the Conner conjecture.- Exercises.- V Borel-Moore Homology.- 1 Cosheaves.- 2 The dual of a differential cosheaf.- 3 Homology theory.- 4 Maps of spaces.- 5 Subspaces and relative homology.- 6 The Vietoris theorem, homotopy, and covering spaces.- 7 The homology sheaf of a map.- 8 The basic spectral sequences.- 9 Poincaré duality.- 10 The cap product.- 11 Intersection theory.- 12 Uniqueness theorems.- 31 Uniqueness theorems for maps and relative homology.- 14 The Künneth formula.- 15 Change of rings.- 16 Generalized manifolds.- 17 Locally homogeneous spaces.- 18 Homological fibrations and p-adic transformation groups.- 19 The transfer homomorphism in homology.- 20 Smith theory in homology.- Exercises.- VI Cosheaves and ?ech Homology.- 1 Theory of cosheaves.- 2 Local triviality.- 3 Local isomorphisms.- 4 Cech homology.- 5 The reflector.- 6 Spectral sequences.- 7 Coresolutions.- 8 Relative ?ech homology.- 9 Locally paracompact spaces.- 10 Borel-Moore homology.- 11 Modified Borel-Moore homology.- 12 Singular homology.- 13 Acyclic coverings.- 14 Applications to maps.- Exercises.- A Spectral Sequences.- 1 The spectral sequence of a filtered complex.- 2 Double complexes.- 3 Products.- 4 Homomorphisms.- B Solutions to Selected Exercises.- Solutions for Chapter I.- Solutions for Chapter II.- Solutions for Chapter III.- Solutions for Chapter IV.- Solutions for Chapter V.- Solutions for Chapter VI.- List of Symbols.- List of Selected Facts.