Groups of Circle Diffeomorphisms

Groups of Circle Diffeomorphisms
Author :
Publisher : University of Chicago Press
Total Pages : 310
Release :
ISBN-10 : 9780226569512
ISBN-13 : 0226569519
Rating : 4/5 (12 Downloads)

Synopsis Groups of Circle Diffeomorphisms by : Andrés Navas

In recent years scholars from a variety of branches of mathematics have made several significant developments in the theory of group actions. Groups of Circle Diffeomorphisms systematically explores group actions on the simplest closed manifold, the circle. As the group of circle diffeomorphisms is an important subject in modern mathematics, this book will be of interest to those doing research in group theory, dynamical systems, low dimensional geometry and topology, and foliation theory. The book is mostly self-contained and also includes numerous complementary exercises, making it an excellent textbook for undergraduate and graduate students.

The Geometry of Infinite-Dimensional Groups

The Geometry of Infinite-Dimensional Groups
Author :
Publisher : Springer Science & Business Media
Total Pages : 304
Release :
ISBN-10 : 9783540772637
ISBN-13 : 3540772634
Rating : 4/5 (37 Downloads)

Synopsis The Geometry of Infinite-Dimensional Groups by : Boris Khesin

This monograph gives an overview of various classes of infinite-dimensional Lie groups and their applications in Hamiltonian mechanics, fluid dynamics, integrable systems, gauge theory, and complex geometry. The text includes many exercises and open questions.

The Structure of Classical Diffeomorphism Groups

The Structure of Classical Diffeomorphism Groups
Author :
Publisher : Springer Science & Business Media
Total Pages : 211
Release :
ISBN-10 : 9781475768008
ISBN-13 : 1475768001
Rating : 4/5 (08 Downloads)

Synopsis The Structure of Classical Diffeomorphism Groups by : Augustin Banyaga

In the 60's, the work of Anderson, Chernavski, Kirby and Edwards showed that the group of homeomorphisms of a smooth manifold which are isotopic to the identity is a simple group. This led Smale to conjecture that the group Diff'" (M)o of cr diffeomorphisms, r ~ 1, of a smooth manifold M, with compact supports, and isotopic to the identity through compactly supported isotopies, is a simple group as well. In this monograph, we give a fairly detailed proof that DifF(M)o is a simple group. This theorem was proved by Herman in the case M is the torus rn in 1971, as a consequence of the Nash-Moser-Sergeraert implicit function theorem. Thurston showed in 1974 how Herman's result on rn implies the general theorem for any smooth manifold M. The key idea was to vision an isotopy in Diff'"(M) as a foliation on M x [0, 1]. In fact he discovered a deep connection between the local homology of the group of diffeomorphisms and the homology of the Haefliger classifying space for foliations. Thurston's paper [180] contains just a brief sketch of the proof. The details have been worked out by Mather [120], [124], [125], and the author [12]. This circle of ideas that we call the "Thurston tricks" is discussed in chapter 2. It explains how in certain groups of diffeomorphisms, perfectness leads to simplicity. In connection with these ideas, we discuss Epstein's theory [52], which we apply to contact diffeomorphisms in chapter 6.

Structure and Regularity of Group Actions on One-Manifolds

Structure and Regularity of Group Actions on One-Manifolds
Author :
Publisher : Springer Nature
Total Pages : 323
Release :
ISBN-10 : 9783030890063
ISBN-13 : 3030890066
Rating : 4/5 (63 Downloads)

Synopsis Structure and Regularity of Group Actions on One-Manifolds by : Sang-hyun Kim

This book presents the theory of optimal and critical regularities of groups of diffeomorphisms, from the classical work of Denjoy and Herman, up through recent advances. Beginning with an investigation of regularity phenomena for single diffeomorphisms, the book goes on to describes a circle of ideas surrounding Filipkiewicz's Theorem, which recovers the smooth structure of a manifold from its full diffeomorphism group. Topics covered include the simplicity of homeomorphism groups, differentiability of continuous Lie group actions, smooth conjugation of diffeomorphism groups, and the reconstruction of spaces from group actions. Various classical and modern tools are developed for controlling the dynamics of general finitely generated group actions on one-dimensional manifolds, subject to regularity bounds, including material on Thompson's group F, nilpotent groups, right-angled Artin groups, chain groups, finitely generated groups with prescribed critical regularities, and applications to foliation theory and the study of mapping class groups. The book will be of interest to researchers in geometric group theory.

The Geometry of the Group of Symplectic Diffeomorphism

The Geometry of the Group of Symplectic Diffeomorphism
Author :
Publisher : Birkhäuser
Total Pages : 138
Release :
ISBN-10 : 9783034882996
ISBN-13 : 3034882998
Rating : 4/5 (96 Downloads)

Synopsis The Geometry of the Group of Symplectic Diffeomorphism by : Leonid Polterovich

The group of Hamiltonian diffeomorphisms Ham(M, 0) of a symplectic mani fold (M, 0) plays a fundamental role both in geometry and classical mechanics. For a geometer, at least under some assumptions on the manifold M, this is just the connected component of the identity in the group of all symplectic diffeomorphisms. From the viewpoint of mechanics, Ham(M,O) is the group of all admissible motions. What is the minimal amount of energy required in order to generate a given Hamiltonian diffeomorphism I? An attempt to formalize and answer this natural question has led H. Hofer [HI] (1990) to a remarkable discovery. It turns out that the solution of this variational problem can be interpreted as a geometric quantity, namely as the distance between I and the identity transformation. Moreover this distance is associated to a canonical biinvariant metric on Ham(M, 0). Since Hofer's work this new ge ometry has been intensively studied in the framework of modern symplectic topology. In the present book I will describe some of these developments. Hofer's geometry enables us to study various notions and problems which come from the familiar finite dimensional geometry in the context of the group of Hamiltonian diffeomorphisms. They turn out to be very different from the usual circle of problems considered in symplectic topology and thus extend significantly our vision of the symplectic world.

Geometry, Rigidity, and Group Actions

Geometry, Rigidity, and Group Actions
Author :
Publisher : University of Chicago Press
Total Pages : 659
Release :
ISBN-10 : 9780226237909
ISBN-13 : 0226237907
Rating : 4/5 (09 Downloads)

Synopsis Geometry, Rigidity, and Group Actions by : Benson Farb

The study of group actions is more than a hundred years old but remains to this day a vibrant and widely studied topic in a variety of mathematic fields. A central development in the last fifty years is the phenomenon of rigidity, whereby one can classify actions of certain groups, such as lattices in semi-simple Lie groups. This provides a way to classify all possible symmetries of important spaces and all spaces admitting given symmetries. Paradigmatic results can be found in the seminal work of George Mostow, Gergory Margulis, and Robert J. Zimmer, among others. The papers in Geometry, Rigidity, and Group Actions explore the role of group actions and rigidity in several areas of mathematics, including ergodic theory, dynamics, geometry, topology, and the algebraic properties of representation varieties. In some cases, the dynamics of the possible group actions are the principal focus of inquiry. In other cases, the dynamics of group actions are a tool for proving theorems about algebra, geometry, or topology. This volume contains surveys of some of the main directions in the field, as well as research articles on topics of current interest.

Flexibility of Group Actions on the Circle

Flexibility of Group Actions on the Circle
Author :
Publisher : Springer
Total Pages : 140
Release :
ISBN-10 : 9783030028558
ISBN-13 : 3030028550
Rating : 4/5 (58 Downloads)

Synopsis Flexibility of Group Actions on the Circle by : Sang-hyun Kim

In this partly expository work, a framework is developed for building exotic circle actions of certain classical groups. The authors give general combination theorems for indiscrete isometry groups of hyperbolic space which apply to Fuchsian and limit groups. An abundance of integer-valued subadditive defect-one quasimorphisms on these groups follow as a corollary. The main classes of groups considered are limit and Fuchsian groups. Limit groups are shown to admit large collections of faithful actions on the circle with disjoint rotation spectra. For Fuchsian groups, further flexibility results are proved and the existence of non-geometric actions of free and surface groups is established. An account is given of the extant notions of semi-conjugacy, showing they are equivalent. This book is suitable for experts interested in flexibility of representations, and for non-experts wanting an introduction to group representations into circle homeomorphism groups.

Categories of Symmetries and Infinite-dimensional Groups

Categories of Symmetries and Infinite-dimensional Groups
Author :
Publisher : Oxford University Press
Total Pages : 436
Release :
ISBN-10 : 0198511868
ISBN-13 : 9780198511861
Rating : 4/5 (68 Downloads)

Synopsis Categories of Symmetries and Infinite-dimensional Groups by : Yu. A. Neretin

There are many types of infinite-dimensional groups, most of which have been studied separately from each other since the 1950s. It is now possible to fit these apparently disparate groups into one coherent picture. With the first explicit construction of hidden structures (mantles and trains), Neretin is able to show how many infinite-dimensional groups are in fact only a small part of a much larger object, analogous to the way real numbers are embedded within complex numbers.

Proceedings Of The International Congress Of Mathematicians 2018 (Icm 2018) (In 4 Volumes)

Proceedings Of The International Congress Of Mathematicians 2018 (Icm 2018) (In 4 Volumes)
Author :
Publisher : World Scientific
Total Pages : 5393
Release :
ISBN-10 : 9789813272897
ISBN-13 : 9813272899
Rating : 4/5 (97 Downloads)

Synopsis Proceedings Of The International Congress Of Mathematicians 2018 (Icm 2018) (In 4 Volumes) by : Boyan Sirakov

The Proceedings of the ICM publishes the talks, by invited speakers, at the conference organized by the International Mathematical Union every 4 years. It covers several areas of Mathematics and it includes the Fields Medal and Nevanlinna, Gauss and Leelavati Prizes and the Chern Medal laudatios.

Issues in Calculus, Mathematical Analysis, and Nonlinear Research: 2013 Edition

Issues in Calculus, Mathematical Analysis, and Nonlinear Research: 2013 Edition
Author :
Publisher : ScholarlyEditions
Total Pages : 772
Release :
ISBN-10 : 9781490106182
ISBN-13 : 1490106189
Rating : 4/5 (82 Downloads)

Synopsis Issues in Calculus, Mathematical Analysis, and Nonlinear Research: 2013 Edition by :

Issues in Calculus, Mathematical Analysis, and Nonlinear Research: 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Mathematical Analysis. The editors have built Issues in Calculus, Mathematical Analysis, and Nonlinear Research: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Mathematical Analysis in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Calculus, Mathematical Analysis, and Nonlinear Research: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.