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arXiv 1206.3877cs.DSmath.CO
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关于后缀数组的组合数学

On the combinatorics of suffix arrays

Gregory Kucherov, Lilla Tóthmérész, Stéphane Vialette

摘要:

我们证明了后缀数组的几个组合性质,包括通过双射与一定的定义良好的一类置换后缀数组的表征。我们的方法是基于[1]中给出的Burrows-Wheeler阵列的特征,我们通过使用额外的哨兵符号将后缀排序减少到循环移位排序来应用。我们证明了[2]中给出的二进制字母表的一个特殊情况的后缀数组的特征很容易从我们的特征。基于我们的结果,我们还对文[3]中关于后缀数组的计数结果提供了简单的证明。我们的方法来表征后缀数组是第一个利用他们的关系与Burrows-Wheeler排列。

英文摘要:

We prove several combinatorial properties of suffix arrays, including a characterization of suffix arrays through a bijection with a certain well-defined class of permutations. Our approach is based on the characterization of Burrows-Wheeler arrays given in [1], that we apply by reducing suffix sorting to cyclic shift sorting through the use of an additional sentinel symbol. We show that the characterization of suffix arrays for a special case of binary alphabet given in [2] easily follows from our characterization. Based on our results, we also provide simple proofs for the enumeration results for suffix arrays, obtained in [3]. Our approach to characterizing suffix arrays is the first that exploits their relationship with Burrows-Wheeler permutations.

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