Geometry of Submanifolds

Author: Bang-Yen Chen

Publisher: Courier Dover Publications

ISBN: 0486832783

Category: Mathematics

Page: 192

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The first two chapters of this frequently cited reference provide background material in Riemannian geometry and the theory of submanifolds. Subsequent chapters explore minimal submanifolds, submanifolds with parallel mean curvature vector, conformally flat manifolds, and umbilical manifolds. The final chapter discusses geometric inequalities of submanifolds, results in Morse theory and their applications, and total mean curvature of a submanifold. Suitable for graduate students and mathematicians in the area of classical and modern differential geometries, the treatment is largely self-contained. Problems sets conclude each chapter, and an extensive bibliography provides background for students wishing to conduct further research in this area. This new edition includes the author's corrections.
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h-Principles and Flexibility in Geometry

Author: Hansjörg Geiges

Publisher: American Mathematical Soc.

ISBN: 0821833154

Category: Mathematics

Page: 58

View: 580

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The notion of homotopy principle or $h$-principle is one of the key concepts in an elegant language developed by Gromov to deal with a host of questions in geometry and topology. Roughly speaking, for a certain differential geometric problem to satisfy the $h$-principle is equivalent to saying that a solution to the problem exists whenever certain obvious topological obstructions vanish. The foundational examples for applications of Gromov's ideas include Hirsch-Smale immersion theory, Nash-Kuiper $C^1$-isometric immersion theory, existence of symplectic and contact structures on open manifolds. Gromov has developed several powerful methods that allow one to prove $h$-principles. These notes, based on lectures given in the Graduiertenkolleg of Leipzig University, present two such methods which are strong enough to deal with applications Hirsch-Smale immersion theory, and existence of symplectic and contact structures on open manifolds.
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Titles

Vol.5 ; Titles : G-O : 1989-90

Author: [Anonymus AC00059365]

Publisher: N.A

ISBN: 9780835227469

Category:

Page: 2114

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Algebraic Geometry--Santa Cruz 1995

Summer Research Institute on Algebraic Geometry, July 9-29, 1995, University of California, Santa Cruz

Author: János Kollár,Summer Research Institute on Algebraic Geometry,Robert Lazarsfeld,David R. Morrison

Publisher: American Mathematical Soc.

ISBN: 082180894X

Category: Science

Page: 447

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This volume contains many of the lectures delivered at the AMS Summer Research Institute on Algebraic Geometry held at the University of California, Santa Cruz, in July 1995. The aim of the conference was to provide a comprehensive view of the development of algebraic geometry in the past decade and to lay special emphasis on emerging new directions. The focus of the papers in these volumes is on expository surveys of important areas rather than on technical presentations of new results. This book is intended for graduate students and research mathematicains interested in algebraic geometry and related areas.
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A Topological Chern-Weil Theory

Author: Anthony Valiant Phillips,David A. Stone

Publisher: American Mathematical Soc.

ISBN: 0821825666

Category: Mathematics

Page: 79

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This work develops a topological analogue of the classical Chern-Weil theory as a method for computing the characteristic classes of principal bundles whose structural group is not necessarily a Lie group, but only a cohomologically finite topological group. Substitutes for the tools of differential geometry, such as the connection and curvature forms, are taken from algebraic topology, using work of Adams, Brown, Eilenberg-Moore, Milgram, Milnor and Stasheff. The result is a synthesis of the algebraic-topological and differential-geometric approaches to characteristic classes. In contrast to the first approach, specific cocycles are used, so as to highlight the influence of local geometry on global topology. In contrast to the second, calculations are carried out at the small scale rather than the infinitesimal; in fact, this work may be viewed as a systematic extension of the observation that curvature is the infinitesimal form of the defect in parallel translation around a rectangle. This book could be used as a text for an advanced graduate course in algebraic topology.
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The Moment Maps in Diffeology

Author: Patrick Iglesias-Zemmour

Publisher: American Mathematical Soc.

ISBN: 0821847090

Category: Mathematics

Page: 72

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This memoir presents a generalization of the moment maps to the category $\{$Diffeology$\}$. This construction applies to every smooth action of any diffeological group $\mathrm{G}$ preserving a closed 2-form $\omega$, defined on some diffeological space $\mathrm{X}$. In particular, that reveals a universal construction, associated to the action of the whole group of automorphisms $\mathrm{Diff}(\mathrm{X},\omega)$. By considering directly the space of momenta of any diffeological group $\mathrm{G}$, that is the space $\mathscr{G}^*$ of left-invariant 1-forms on $\mathrm{G}$, this construction avoids any reference to Lie algebra or any notion of vector fields, or does not involve any functional analysis. These constructions of the various moment maps are illustrated by many examples, some of them originals and others suggested by the mathematical literature.
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