Semi−synchronous transductions

Semi-synchronously rational relations generalise synchronised rational relations in a natural way. We discuss here some of their basic properties, among them a \"Cobham-Semenov-like\" dichotomy theorem. Our main result is a characterisation of bijective semi-synchronously rational transduc...

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Bibliografski detalji
Glavni autor: Barany, V
Format: Journal article
Izdano: 2008
Opis
Sažetak:Semi-synchronously rational relations generalise synchronised rational relations in a natural way. We discuss here some of their basic properties, among them a \"Cobham-Semenov-like\" dichotomy theorem. Our main result is a characterisation of bijective semi-synchronously rational transductions as those bijections mapping regular relations to regular ones and non-regular relations to non-regular ones.