arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1702.06594cs.CL
收藏

关于CCG解析的复杂性

On the Complexity of CCG Parsing

Linköping University(林雪平大学);University of Padua(帕多瓦大学)

Marco Kuhlmann, Giorgio Satta, Peter Jonsson

摘要:

我们在Vijay-Shanker和Weir(1994)的句法分析理论框架下研究了组合范畴语法的句法分析复杂性。作为我们的主要结果,我们证明了任何解析算法,这种形式主义将采取在最坏情况下的指数时间时,语法的大小,而不仅仅是输入句子的长度,包括在分析中。这使得Vijay-Shanker和Weir(1994)的形式主义与弱等价的形式主义(如树邻接语法(TAG))区分开来,后者可以在语法和输入句子的组合大小中以时间多项式进行解析。我们的研究结果有助于一个精致的理解类轻度上下文敏感的语法,并通知搜索新的,轻度上下文敏感版本的CCG。

英文摘要:

We study the parsing complexity of Combinatory Categorial Grammar (CCG) in the formalism of Vijay-Shanker and Weir (1994). As our main result, we prove that any parsing algorithm for this formalism will take in the worst case exponential time when the size of the grammar, and not only the length of the input sentence, is included in the analysis. This sets the formalism of Vijay-Shanker and Weir (1994) apart from weakly equivalent formalisms such as Tree-Adjoining Grammar (TAG), for which parsing can be performed in time polynomial in the combined size of grammar and input sentence. Our results contribute to a refined understanding of the class of mildly context-sensitive grammars, and inform the search for new, mildly context-sensitive versions of CCG.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑