An algebraic proof of Rabin's Tree Theorem

  • Authors:
  • Achim Blumensath

  • Affiliations:
  • -

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2013

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Abstract

We continue the development of a theory of recognisability for infinite trees by introducing the equivalent of a Wilke algebra. As an application we give a new proof of the decidability of the monadic second-order theory of the infinite binary tree, a proof that does not use automata or games.