Witnessing subsystems for probabilistic systems with low tree width

  title={Witnessing subsystems for probabilistic systems with low tree width},
  author={Simon Jantsch and Jakob Piribauer and Christel Baier},
A standard way of justifying that a certain probabilistic property holds in a system is to provide a witnessing subsystem (also called critical subsystem) for the property. Computing minimal witnessing subsystems is NP-hard already for acyclic Markov chains, but can be done in polynomial time for Markov chains whose underlying graph is a tree. This paper considers the problem for probabilistic systems that are similar to trees or paths. It introduces the parameters directed tree-partition width… 

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