arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.4941cs.LOcs.DS
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参数化模态可满足性

Parameterized Modal Satisfiability

Antonis Achilleos, Michael Lampis, Valia Mitsou

摘要:

我们研究了模态逻辑可满足性问题的参数化计算复杂性,并试图找出导致问题的组合爆炸的相关结构参数,超出命题变量v的数量。为此,我们研究了模态深度,一个自然的测量,这已经出现在文献中,并表明,即使模态可满足性参数v和模态深度是FPT,运行时间对参数的依赖是一个指数塔(除非P=NP)。为了克服这个限制,我们提出了几个可能的替代参数,即菱形尺寸,盒尺寸和模态宽度。我们显示固定参数的易处理性结果使用这些措施的指数依赖的参数是温和得多的情况下,模态深度,从而导致FPT算法的模态可满足性更合理的运行时间。

英文摘要:

We investigate the parameterized computational complexity of the satisfiability problem for modal logic and attempt to pinpoint relevant structural parameters which cause the problem's combinatorial explosion, beyond the number of propositional variables v. To this end we study the modality depth, a natural measure which has appeared in the literature, and show that, even though modal satisfiability parameterized by v and the modality depth is FPT, the running time's dependence on the parameters is a tower of exponentials (unless P=NP). To overcome this limitation we propose several possible alternative parameters, namely diamond dimension, box dimension and modal width. We show fixed-parameter tractability results using these measures where the exponential dependence on the parameters is much milder than in the case of modality depth thus leading to FPT algorithms for modal satisfiability with much more reasonable running times.

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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