Ergodic-type characterizations of algorithmic randomness

  • Authors:
  • Laurent Bienvenu;Adam Day;Ilya Mezhirov;Alexander Shen

  • Affiliations:
  • LIAFA, CNRS & Université de Paris 7, France;Victoria University of Wellington, New Zealand;Technical University of Kaiserslautern;LIF, CNRS & Université d'Aix-Marseille 1, France

  • Venue:
  • CiE'10 Proceedings of the Programs, proofs, process and 6th international conference on Computability in Europe
  • Year:
  • 2010

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Abstract

A theorem of Kučera states that given a Martin-Löf random infinite binary sequence ω and an effectively open set A of measure less than 1, some tail of ω is not in A. We show that this result can be seen as an effective version of Birkhoff's ergodic theorem (in a special case). We prove several results in the same spirit and generalize them via an effective ergodic theorem for bijective ergodic maps.