Extending Intersection Homology Type Invariants to Non-Witt Spaces PDF Download
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Author: Markus Banagl
Publisher: American Mathematical Soc.
ISBN: 0821829882
Category : Mathematics
Languages : en
Pages : 101
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Book Description
Intersection homology theory provides a way to obtain generalized Poincare duality, as well as a signature and characteristic classes, for singular spaces. For this to work, one has had to assume however that the space satisfies the so-called Witt condition. We extend this approach to constructing invariants to spaces more general than Witt spaces.
Author: Markus Banagl
Publisher: American Mathematical Soc.
ISBN: 0821829882
Category : Mathematics
Languages : en
Pages : 101
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Book Description
Intersection homology theory provides a way to obtain generalized Poincare duality, as well as a signature and characteristic classes, for singular spaces. For this to work, one has had to assume however that the space satisfies the so-called Witt condition. We extend this approach to constructing invariants to spaces more general than Witt spaces.
Author: Greg Friedman
Publisher: Cambridge University Press
ISBN: 1107150744
Category : Mathematics
Languages : en
Pages : 823
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Book Description
The first expository book-length introduction to intersection homology from the viewpoint of singular and piecewise linear chains.
Author: Laurenţiu G. Maxim
Publisher: Springer Nature
ISBN: 3030276449
Category : Mathematics
Languages : en
Pages : 278
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Book Description
This textbook provides a gentle introduction to intersection homology and perverse sheaves, where concrete examples and geometric applications motivate concepts throughout. By giving a taste of the main ideas in the field, the author welcomes new readers to this exciting area at the crossroads of topology, algebraic geometry, analysis, and differential equations. Those looking to delve further into the abstract theory will find ample references to facilitate navigation of both classic and recent literature. Beginning with an introduction to intersection homology from a geometric and topological viewpoint, the text goes on to develop the sheaf-theoretical perspective. Then algebraic geometry comes to the fore: a brief discussion of constructibility opens onto an in-depth exploration of perverse sheaves. Highlights from the following chapters include a detailed account of the proof of the Beilinson–Bernstein–Deligne–Gabber (BBDG) decomposition theorem, applications of perverse sheaves to hypersurface singularities, and a discussion of Hodge-theoretic aspects of intersection homology via Saito’s deep theory of mixed Hodge modules. An epilogue offers a succinct summary of the literature surrounding some recent applications. Intersection Homology & Perverse Sheaves is suitable for graduate students with a basic background in topology and algebraic geometry. By building context and familiarity with examples, the text offers an ideal starting point for those entering the field. This classroom-tested approach opens the door to further study and to current research.
Author: Greg Friedman
Publisher: Cambridge University Press
ISBN: 052119167X
Category : Mathematics
Languages : en
Pages : 491
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Book Description
This book explores the study of singular spaces using techniques from areas within geometry and topology and the interactions among them.
Author: Olivier Druet
Publisher: American Mathematical Soc.
ISBN: 0821829890
Category : Mathematics
Languages : en
Pages : 113
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Book Description
Function theory and Sobolev inequalities have been the target of investigation for many years. Sharp constants in these inequalities constitute a critical tool in geometric analysis. The $AB$ programme is concerned with sharp Sobolev inequalities on compact Riemannian manifolds. This text summarizes the results of contemporary research and gives an up-to-date report on the field.
Author: Yasuyuki Kachi
Publisher: American Mathematical Soc.
ISBN: 0821832255
Category : Mathematics
Languages : en
Pages : 133
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Book Description
Introduction The universal pseudo-quotient for a family of subvarieties Normal bundles of quadrics in $X$ Morphisms from quadrics to Grassmannians Pointwise uniform vector bundles on non-singular quadrics Theory of extensions of families over Hilbert schemes Existence of algebraic quotient--proof of Theorem 0.3 Appendix. Deformations of vector bundles on infinitesimally rigid projective varieties with null global $i$-forms References
Author: L. Rodman
Publisher: American Mathematical Soc.
ISBN: 0821829963
Category : Mathematics
Languages : en
Pages : 87
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Book Description
In this work, versions of an abstract scheme are developed, which are designed to provide a framework for solving a variety of extension problems. The abstract scheme is commonly known as the band method. The main feature of the new versions is that they express directly the conditions for existence of positive band extensions in terms of abstract factorizations (with certain additional properties). The results prove, amongst other things, that the band extension is continuous in an appropriate sense.
Author: Jean-paul Brasselet
Publisher: World Scientific
ISBN: 9814476390
Category : Mathematics
Languages : en
Pages : 1083
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Book Description
The Singularity School and Conference took place in Luminy, Marseille, from January 24th to February 25th 2005. More than 180 mathematicians from over 30 countries converged to discuss recent developments in singularity theory.The volume contains the elementary and advanced courses conducted by singularities specialists during the conference, general lectures on singularity theory, and lectures on applications of the theory to various domains. The subjects range from geometry and topology of singularities, through real and complex singularities, to applications of singularities.
Author: Desmond Sheiham
Publisher: American Mathematical Soc.
ISBN: 0821833405
Category : Mathematics
Languages : en
Pages : 128
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Book Description
An $n$-dimensional $\mu$-component boundary link is a codimension $2$ embedding of spheres $L=\sqcup_{\mu}S DEGREESn \subset S DEGREES{n+2}$ such that there exist $\mu$ disjoint oriented embedded $(n+1)$-manifolds which span the components of $L$. This title proceeds to compute the isomorphism class of $C_{
Author: Pierre Lochak
Publisher: American Mathematical Soc.
ISBN: 0821832689
Category : Mathematics
Languages : en
Pages : 162
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Book Description
Presents the problem of the splitting of invariant manifolds in multidimensional Hamiltonian systems, stressing the canonical features of the problem. This book offers introduction of a canonically invariant scheme for the computation of the splitting matrix.
