This volume in the Encyclopedia of Complexity and Systems Science, Second Edition, presents all of the major areas of ergodic theory, including recent developments in the Sarnak conjecture via ergodic theory tools, the entropy theory for nonamenable group actions, and interval exchange transformations. In addition, the new edition features expanded coverage of Poisson dynamical systems as a part of dynamical systems of probabilistic origin, as well as the interplay of ergodic theory with operator algebras and new applications to billiards and surface dynamics.weiterlesen