Abstract
It is known that the first-order theory with a single predicate → that denotes a one-step rewriting reduction on terms is undecidable already for formulae with ∃ ∀ prefix. Several decidability results exist for the fragment of the theory in which the formulae start with the ∃ prefix only. This paper considers a similar fragment for a predicate →p which denotes the parallel one-step rewriting reduction. We show that the first-order theory of →p is undecidable already for formulae with ∃ 7 prefix and left-linear rewrite systems.
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Schubert, A. (2009). The Existential Fragment of the One-Step Parallel Rewriting Theory. In: Treinen, R. (eds) Rewriting Techniques and Applications. RTA 2009. Lecture Notes in Computer Science, vol 5595. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-02348-4_6
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DOI: https://doi.org/10.1007/978-3-642-02348-4_6
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