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Computing Measures of Weak-MSO Definable Sets of Trees

Authors Damian Niwiński, Marcin Przybyłko, Michał Skrzypczak

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Author Details

Damian Niwiński
  • Institute of Informatics, University of Warsaw, Poland
Marcin Przybyłko
  • Fachbereich Informatik, University of Bremen, Germany
Michał Skrzypczak
  • Institute of Informatics, University of Warsaw, Poland

Funding

  • Niwiński, Damian: Polish National Science Centre grant no. 2014-13 ST6/03595.
  • Przybyłko, Marcin: ERC consolidator grant 647289 CODA.
  • Skrzypczak, Michał: Polish National Science Centre grant no. 2016/22/E/ST6/00041.

Cite AsGet BibTex

Damian Niwiński, Marcin Przybyłko, and Michał Skrzypczak. Computing Measures of Weak-MSO Definable Sets of Trees. In 47th International Colloquium on Automata, Languages, and Programming (ICALP 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 168, pp. 136:1-136:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020)
https://doi.org/10.4230/LIPIcs.ICALP.2020.136

Abstract

This work addresses the problem of computing measures of recognisable sets of infinite trees. An algorithm is provided to compute the probability measure of a tree language recognisable by a weak alternating automaton, or equivalently definable in weak monadic second-order logic. The measure is the uniform coin-flipping measure or more generally it is generated by a branching stochastic process. The class of tree languages in consideration, although smaller than all regular tree languages, comprises in particular the languages definable in the alternation-free μ-calculus or in temporal logic CTL. Thus, the new algorithm may enhance the toolbox of probabilistic model checking.

Subject Classification

ACM Subject Classification
  • Theory of computation → Automata over infinite objects
  • Mathematics of computing → Markov processes
Keywords
  • infinite trees
  • weak alternating automata
  • coin-flipping measure

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