Highly Acyclic Groups, Hypergraph Covers and the Guarded Fragment
Highly Acyclic Groups, Hypergraph Covers and the Guarded Fragment
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高度无环群、超图覆盖和保护片段
DOI:
10.1145/2108242.2108247
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
M. Otto
中科院分区:
文献类型:
--
作者:
M. Otto
We construct finite groups whose Cayley graphs have large girth even with respect to a discounted distance measure that contracts arbitrarily long sequences of edges from the same color class (subgroup), and only counts transitions between color classes (cosets). These groups are shown to be useful in the construction of finite bisimilar hypergraph covers that avoid any small cyclic configurations. We present two applications to the finite model theory of the guarded fragment: a strengthening of the known finite model property for GF and the characterization of GF as the guarded bisimulation invariant fragment of first-order logic in the sense of finite model theory.
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DOI:
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发表时间:
1999
期刊:
Journal of Symbolic Logic (JSL)
影响因子:
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作者:
E. Grädel
通讯作者:
E. Grädel
DOI:
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发表时间:
2006
期刊:
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作者:
M. Otto
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影响因子:
0.6
作者:
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通讯作者:
M. Otto
DOI:
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1997
期刊:
Journal of Logic, Language and Information
影响因子:
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作者:
Eric Rosen
通讯作者:
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DOI:
--
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1957
期刊:
影响因子:
--
作者:
R. Fox
通讯作者:
R. Fox