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arXiv 1104.3148cs.LOcs.CC
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二元依赖逻辑与IF-逻辑的复杂性

Complexity of two-variable Dependence Logic and IF-Logic

Juha Kontinen, Antti Kuusisto, Peter Lohmann, Jonni Virtema

摘要:

我们研究了依赖逻辑和独立友好逻辑的双变量片段D^2和IF^2。我们考虑了这些逻辑的可满足性和有限可满足性问题,并证明了对于D^2,这两个问题都是NEXPTIME-完全的,而对于IF^2,这两个问题是不可判定的。我们还证明了D^2的表达性严格低于IF^2,并且在D^2中已经可以表达两个一元谓词的等价性和无穷大(后者在存在常数符号的情况下)。这是第26届IEEE计算机科学逻辑研讨会(LICS 2011)会议录中出版物的扩展版本。

英文摘要:

We study the two-variable fragments D^2 and IF^2 of dependence logic and independence-friendly logic. We consider the satisfiability and finite satisfiability problems of these logics and show that for D^2, both problems are NEXPTIME-complete, whereas for IF^2, the problems are undecidable. We also show that D^2 is strictly less expressive than IF^2 and that already in D^2, equicardinality of two unary predicates and infinity can be expressed (the latter in the presence of a constant symbol). This is an extended version of a publication in the proceedings of the 26th Annual IEEE Symposium on Logic in Computer Science (LICS 2011).

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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