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Paper detail

One-way resynchronizability of word transducers

The origin semantics for transducers was proposed in 2014, and led to various characterizations and decidability results that are in contrast with the classical semantics. In this paper we add a further decidability result for characterizing transducers that are close to one-way transducers in the origin semantics. We show that it is decidable whether a non-deterministic two-way word transducer can be resynchronized by a bounded, regular resynchronizer into an origin-equivalent one-way transducer. The result is in contrast with the usual semantics, where it is undecidable to know if a non-deterministic two-way transducer is equivalent to some one-way transducer.

preprint2021arXivOpen access
Sougata BoseS. N. KrishnaAnca MuschollGabriele Puppis
Logic in Computer ScienceFormal Languages and Automata Theory
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Sougata BoseS. N. KrishnaAnca MuschollGabriele Puppis

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