Abstract
Two characterizations of transductions defined by abstract families of transducers are presented. The first characterization is in terms of languages defined by acceptors derived from the transducers when the output structure is removed. The second characterization is in terms of sets of pairs of words satisfying certain closure operations.
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Ibarra, O.H. Characterizations of transductions defined by abstract families of transducers. Math. Systems Theory 5, 271–281 (1971). https://doi.org/10.1007/BF01694183
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DOI: https://doi.org/10.1007/BF01694183