Weighted automata and weighted logics with discounting

  • Authors:
  • Manfred Droste;George Rahonis

  • Affiliations:
  • Institute of Computer Science, Leipzig University, Leipzig, Germany;Department of Mathematics, Aristotle University of Thessaloniki, Thessaloniki, Greece

  • Venue:
  • CIAA'07 Proceedings of the 12th international conference on Implementation and application of automata
  • Year:
  • 2007

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Abstract

We introduce a weighted logic with discounting and we establish Büchi's and Elgot's theorem for weighted automata over finite words and arbitrary commutative semirings. Then we investigate Büchi and Muller automata with discounting over the max-plus and the minplus semiring. We show their expressive equivalence with weighted MSO-sentences with discounting. In this case our logic has a purely syntactic definition. For the finite case, we obtain a purely syntactically defined weighted logic if the underlying semiring is additively locally finite.