Synchronous forest substitution grammars

Authors

  • Andreas Maletti

DOI:

https://doi.org/10.14232/actacyb.23.1.2017.15

Abstract

The expressive power of synchronous forest (tree-sequence) substitution grammars (SFSGs) is studied in relation to multi bottom-up tree transducers (MBOTs). It is proved that SFSGs have exactly the same expressive power as compositions of an inverse MBOT with an MBOT. This result is used to derive complexity results for SFSGs and the fact that compositions of an MBOT with an inverse MBOT can compute tree translations that cannot be computed by any SFSG, although the class of tree translations computable by MBOTs is closed under composition.

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Published

2017-01-01

How to Cite

Maletti, A. (2017). Synchronous forest substitution grammars. Acta Cybernetica, 23(1), 269–281. https://doi.org/10.14232/actacyb.23.1.2017.15

Issue

Section

Regular articles