Computability Theoretic Properties of the Entropy of Gap Shifts

  • Authors:
  • Peter Hertling;Christoph Spandl

  • Affiliations:
  • Institut für Theoretische Informatik und Mathematik, Fakultät für Informatik, Universität der Bundeswehr München 85577 Neubiberg, Germany. E-mails: peter.hertling@unibw.de ...;Institut für Theoretische Informatik und Mathematik, Fakultät für Informatik, Universität der Bundeswehr München 85577 Neubiberg, Germany. E-mails: peter.hertling@unibw.de ...

  • Venue:
  • Fundamenta Informaticae
  • Year:
  • 2008

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Abstract

First, we analyse the computability theoretic relationship between the defining set S of a "gap shift" and the language of the gap shift. Therefore, we look at various computability theoretic conditions that the set S of a gap shift or the language of a gap shift might satisfy: decidability, computable enumerability, and computable enumerability of the complement. Then we look at the topological entropy of a gap shift and analyse the relationship between on the one hand the various kinds of computability theoretic conditions on a gap shift that we just mentioned and on the other hand various kinds of computability theoretic conditions on the entropy resp. on any real number in the unit interval: computability, left-computability, and right-computability.