NDLI: Efficient generation of lexically proper palindromes

Content Provider	ACM Digital Library
Author	Xu, T. Berghel, Hal Rankin, Richard
Abstract	Palindromes are strings of symbols which are symmetrical about the center. This paper outlines a method for generating certain types of palindromes, called lexical palindromes, which consist of legitimate English words. The method reported provides substantial pruning of a Prolog search tree by calculating the number of success nodes along certain search paths instead of visiting them, indexing words to improve database performance, and continuous analysis of current states to eliminate non-productive search paths. These efficiency measures allow lexical palindromes to be generated using a microcomputer.Our ultimate objective is to be able to estimate the ratio of sentential palindromes for any given length to the set of syntactically well-formed English sentences of that length with respect to a given lexicon and grammatical model. We shall take up the problem of determining the ratio of sentential palindromes to well-formed sentences in a sequel to this paper.
Starting Page	151
Ending Page	155
Page Count	5
File Format	PDF
ISBN	0897913477
DOI	10.1145/99412.99451
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1990-02-01
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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Efficient generation of lexically proper palindromes