Group actions in ergodic theory, geometry, and topology : selected papers

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Group actions in ergodic theory, geometry, and topology : selected papers

Robert J. Zimmer ; edited by David Fisher ; with a foreword by David Fisher, Alexander Lubotzky, and Gregory Margulis

University of Chicago Press, 2020

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Includes bibliographical references

Summary: "This volume of Robert J. Zimmer's selected papers, collected here for the first time, provides a rich context for his now-classic insights on group actions. The volume opens with a foreword by David Fisher, Alexander Lubotzky, and Gregory Margulis, as well as a substantial introductory essay by Zimmer himself, recounting the course of his career in mathematics. The volume closes with an article by Fisher on the most recent developments around the Zimmer program"-- Provided by publisher

Contents of Works

  • Spectra and structure of ergodic actions
  • Amenable actions, equivalence relations, and foliations
  • Orbit equivalence and strong rigidity
  • Cocycle superrigidity and the program to describe Lie group and lattice actions on manifolds
  • Stabilizers of semisimple Lie group actions : invariant random subgroups
  • Representations and arithmetic properties of actions, fundamental groups, and foliations
  • Geometric structures : automorphisms of geometric manifolds and rigid structures ; locally homogeneous manifolds
  • Stationary measures and structure theorems for Lie group actions

Description and Table of Contents

Description

Robert J. Zimmer is best known in mathematics for the highly influential conjectures and program that bear his name. Group Actions in Ergodic Theory, Geometry, and Topology: Selected Papers brings together some of the most significant writings by Zimmer, which lay out his program and contextualize his work over the course of his career. Zimmer's body of work is remarkable in that it involves methods from a variety of mathematical disciplines, such as Lie theory, differential geometry, ergodic theory and dynamical systems, arithmetic groups, and topology, and at the same time offers a unifying perspective. After arriving at the University of Chicago in 1977, Zimmer extended his earlier research on ergodic group actions to prove his cocycle superrigidity theorem which proved to be a pivotal point in articulating and developing his program. Zimmer's ideas opened the door to many others, and they continue to be actively employed in many domains related to group actions in ergodic theory, geometry, and topology. In addition to the selected papers themselves, this volume opens with a foreword by David Fisher, Alexander Lubotzky, and Gregory Margulis, as well as a substantial introductory essay by Zimmer recounting the course of his career in mathematics. The volume closes with an afterword by Fisher on the most recent developments around the Zimmer program.

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