arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1004.3246cs.FLcs.CC
收藏

有限自动机中求复位字的复杂性

The Complexity of Finding Reset Words in Finite Automata

Jörg Olschewski, Michael Ummels

摘要:

本文研究了确定性有限自动机中与寻找重置字有关的几个问题。特别是,我们建立的问题,决定是否一个最短的复位字的长度为k是完整的复杂性类DP。这个结果回答了Volkov提出的一个问题。对于寻找最短复位字和最短复位字的长度的搜索问题,我们分别在复杂性类FP^NP和FP^NP[log]中建立成员关系。此外,我们证明了这两个问题对于FP^NP[log]是困难的。最后,我们观察到,计算一个给定长度的复位字是FNP完全的。

英文摘要:

We study several problems related to finding reset words in deterministic finite automata. In particular, we establish that the problem of deciding whether a shortest reset word has length k is complete for the complexity class DP. This result answers a question posed by Volkov. For the search problems of finding a shortest reset word and the length of a shortest reset word, we establish membership in the complexity classes FP^NP and FP^NP[log], respectively. Moreover, we show that both these problems are hard for FP^NP[log]. Finally, we observe that computing a reset word of a given length is FNP-complete.

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。

↑