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| Author | : A. S. Kechris |
| Publisher | : American Mathematical Soc. |
| Total Pages | : 258 |
| Release | : 2010 |
| Genre | : Mathematics |
| ISBN | : 0821848941 |
A study of ergodic, measure preserving actions of countable discrete groups on standard probability spaces. It explores a direction that emphasizes a global point of view, concentrating on the structure of the space of measure preserving actions of a given group and its associated cocycle spaces.
| Author | : Benson Farb |
| Publisher | : University of Chicago Press |
| Total Pages | : 659 |
| Release | : 2011-04-15 |
| Genre | : Mathematics |
| ISBN | : 0226237907 |
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.
| Author | : Robert S. Doran |
| Publisher | : American Mathematical Soc. |
| Total Pages | : 458 |
| Release | : 2008 |
| Genre | : Mathematics |
| ISBN | : 0821842250 |
George Mackey was an extraordinary mathematician of great power and vision. His profound contributions to representation theory, harmonic analysis, ergodic theory, and mathematical physics left a rich legacy for researchers that continues today. This book is based on lectures presented at an AMS special session held in January 2007 in New Orleans dedicated to his memory. The papers, written especially for this volume by internationally-known mathematicians and mathematical physicists, range from expository and historical surveys to original high-level research articles. The influence of Mackey's fundamental ideas is apparent throughout. The introductory article contains recollections from former students, friends, colleagues, and family as well as a biography describing his distinguished career as a mathematician at Harvard, where he held the Landon D. Clay Professorship of Mathematics.
| Author | : David Kerr |
| Publisher | : Springer |
| Total Pages | : 455 |
| Release | : 2017-02-09 |
| Genre | : Mathematics |
| ISBN | : 3319498479 |
This book provides an introduction to the ergodic theory and topological dynamics of actions of countable groups. It is organized around the theme of probabilistic and combinatorial independence, and highlights the complementary roles of the asymptotic and the perturbative in its comprehensive treatment of the core concepts of weak mixing, compactness, entropy, and amenability. The more advanced material includes Popa's cocycle superrigidity, the Furstenberg-Zimmer structure theorem, and sofic entropy. The structure of the book is designed to be flexible enough to serve a variety of readers. The discussion of dynamics is developed from scratch assuming some rudimentary functional analysis, measure theory, and topology, and parts of the text can be used as an introductory course. Researchers in ergodic theory and related areas will also find the book valuable as a reference.
| Author | : Kanishka Perera |
| Publisher | : American Mathematical Soc. |
| Total Pages | : 170 |
| Release | : 2010 |
| Genre | : Mathematics |
| ISBN | : 0821849689 |
Presents a Morse theoretic study of a very general class of homogeneous operators that includes the $p$-Laplacian as a special case. The $p$-Laplacian operator is a quasilinear differential operator that arises in many applications such as non-Newtonian fluid flows. Working with a new sequence of eigenvalues that uses the cohomological index, the authors systematically develop alternative tools such as nonlinear linking and local splitting theories in order to effectively apply Morse theory to quasilinear problems.
| Author | : Lewis Bowen |
| Publisher | : American Mathematical Soc. |
| Total Pages | : 280 |
| Release | : 2012 |
| Genre | : Mathematics |
| ISBN | : 0821869221 |
This volume contains cutting-edge research from leading experts in ergodic theory, dynamical systems and group actions. A large part of the volume addresses various aspects of ergodic theory of general group actions including local entropy theory, universal minimal spaces, minimal models and rank one transformations. Other papers deal with interval exchange transformations, hyperbolic dynamics, transfer operators, amenable actions and group actions on graphs.
| Author | : James Cummings |
| Publisher | : Cambridge University Press |
| Total Pages | : 433 |
| Release | : 2012-11-15 |
| Genre | : Mathematics |
| ISBN | : 1107608503 |
Papers based on a series of workshops where prominent researchers present exciting developments in set theory to a broad audience.
| Author | : Robert Ray Bruner |
| Publisher | : American Mathematical Soc. |
| Total Pages | : 328 |
| Release | : 2010 |
| Genre | : Mathematics |
| ISBN | : 0821851896 |
Focusing on the study of real connective $K$-theory including $ko^*(BG)$ as a ring and $ko_*(BG)$ as a module over it, the authors define equivariant versions of connective $KO$-theory and connective $K$-theory with reality, in the sense of Atiyah, which give well-behaved, Noetherian, uncompleted versions of the theory.
| Author | : Thierry Giordano |
| Publisher | : Springer |
| Total Pages | : 494 |
| Release | : 2018-08-28 |
| Genre | : Mathematics |
| ISBN | : 3319708694 |
This book collects the notes of the lectures given at an Advanced Course on Dynamical Systems at the Centre de Recerca Matemàtica (CRM) in Barcelona. The notes consist of four series of lectures. The first one, given by Andrew Toms, presents the basic properties of the Cuntz semigroup and its role in the classification program of simple, nuclear, separable C*-algebras. The second series of lectures, delivered by N. Christopher Phillips, serves as an introduction to group actions on C*-algebras and their crossed products, with emphasis on the simple case and when the crossed products are classifiable. The third one, given by David Kerr, treats various developments related to measure-theoretic and topological aspects of crossed products, focusing on internal and external approximation concepts, both for groups and C*-algebras. Finally, the last series of lectures, delivered by Thierry Giordano, is devoted to the theory of topological orbit equivalence, with particular attention to the classification of minimal actions by finitely generated abelian groups on the Cantor set.
