The Complexity of Synthesis of b-Bounded Petri Nets
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For a fixed type of Petri nets τ, τ-Synthesis is the task of finding for a given transition system A a Petri net N of type τ (τ-net, for short) whose reachability graph is isomorphic to A if there is one. The decision version of this search problem is called τ-Solvability. If an input A allows a positive decision, then it is called τ-solvable and a sought net N τ-solves A. As a well known fact, A is τ-solvable if and only if it has the so-called τ-event state separation property (τ-ESSP, for short) and the τ-state separation property (τ-SSP, for short). The question whether A has the τ-ESSP or the τ-SSP defines also decision problems. In this paper, for all b∈ℕ, we completely characterize the computational complexity of τ-Solvability, τ-ESSP and τ-SSP for the types of pure b-bounded Place/Transition-nets, the b-bounded Place/Transition-nets and their corresponding ℤ_b+1-extensions.
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