DECIDING WHETHER A FINITE-SET OF WORDS HAS RANK AT MOST 2

被引:5
|
作者
NERAUD, J
机构
[1] LIR, LITP, Institut Blaise Pascal, Université de Rouen, Faculté des Sciences, Place Emile Blondel
关键词
D O I
10.1016/0304-3975(93)90023-M
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
Given a finite subset X of a free monoid A*, we define the rank of X as r(X) = min {Absolute value of Y: X subset-or-equal-to Y*}. The problem we study here is to decide whether or not r(X) less-than-or-equal-to 2. We propose an O(n ln2 m) algorithm, where n stands for the sum of the lengths of the words in X, and m stands for the length of the longest word.
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页码:311 / 337
页数:27
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