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arXiv 1905.04746math.COcs.DM
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无限字的广义Lyndon分解

Generalized Lyndon Factorizations of Infinite Words

Amanda Burcroff, Eric Winsor

摘要:

一个广义的词汇序是一个词汇序,其中字母表的总顺序取决于比较的位置。广义林登字是一个有限字,它是严格最小的一类旋转关于广义字典序。这个概念可以扩展到无限词:无限广义林登词是一个无限词,它在它的后缀类中是严格最小的。我们证明了Dolce,Restivo,和Albertenauer猜想:每一个无限的字有一个独特的非递增分解成有限和无限的广义林登字。当这个分解有很多项时,我们刻画了分解的末项。我们的方法还表明,无限广义林登词正是具有无限多个广义林登前缀的词。

英文摘要:

A generalized lexicographic order on words is a lexicographic order where the total order of the alphabet depends on the position of the comparison. A generalized Lyndon word is a finite word which is strictly smallest among its class of rotations with respect to a generalized lexicographic order. This notion can be extended to infinite words: an infinite generalized Lyndon word is an infinite word which is strictly smallest among its class of suffixes. We prove a conjecture of Dolce, Restivo, and Reutenauer: every infinite word has a unique nonincreasing factorization into finite and infinite generalized Lyndon words. When this factorization has finitely many terms, we characterize the last term of the factorization. Our methods also show that the infinite generalized Lyndon words are precisely the words with infinitely many generalized Lyndon prefixes.

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。

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