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首页> 外文期刊>INTEGERS: electronic journal of Combinatorial Number Theory >OVERLAP CYCLES FOR PERMUTATIONS: NECESSARY AND SUFFICIENT CONDITIONS
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OVERLAP CYCLES FOR PERMUTATIONS: NECESSARY AND SUFFICIENT CONDITIONS

机译:重叠周期进行排列:必要和充分的条件

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Universal cycles are generalizations of de Bruijn cycles and Gray codes that were introduced originally by Chung, Diaconis, and Graham in 1992. They have been developed by many authors since, for various combinatorial objects such as strings, subsets, and designs. Certain classes of objects do not admit universal cycles without either a modification of either the object representation or a generalization of the listing structure. One such generalization of universal cycles, which require almost complete overlap of consecutive words, is s-overlap cycles, which relax such a constraint. In this paper we study permutations and some closely related classes of strings, namely juggling sequences and functions. We prove the existence of s-overlap cycles for these objects, as they do not always lend themselves to the universal cycle structure.
机译:通用周期是由Chung,Diagonis和Graham引入的De Bruijn循环和灰色代码的概括1992年。它们已经由许多作者开发,因为对于各种组合物体,例如弦,子集和设计。某些类对象不承认通用周期,而无需修改对象表示或列表结构的泛化。一种这样的通用周期的概括,其需要几乎完全重叠的连续单词,是S - 重叠循环,其松弛这种约束。在本文中,我们研究排列和一些密切相关的字符串,即杂耍序列和功能。我们证明了这些对象的S-REMULTAP周期的存在,因为它们并不总是借给普遍循环结构。

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