Strong Equivalence of TAG and CCG
Formal Languages and Automata Theory
2022-05-17 v1 Computation and Language
Abstract
Tree-adjoining grammar (TAG) and combinatory categorial grammar (CCG) are two well-established mildly context-sensitive grammar formalisms that are known to have the same expressive power on strings (i.e., generate the same class of string languages). It is demonstrated that their expressive power on trees also essentially coincides. In fact, CCG without lexicon entries for the empty string and only first-order rules of degree at most 2 are sufficient for its full expressive power.
Keywords
Cite
@article{arxiv.2205.07743,
title = {Strong Equivalence of TAG and CCG},
author = {Andreas Maletti and Lena Katharina Schiffer},
journal= {arXiv preprint arXiv:2205.07743},
year = {2022}
}
Comments
30 pages, 6 figures, revised and extended version of paper appearing in Trans. ACL (2021) 9: 707-720