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arXiv 2109.08313cs.LOcs.MA
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LFD的有限模型性质及互模拟

Finite Model Property and Bisimulation for LFD

Raoul Koudijs

摘要:

最近,Baltag和van Benthem引入了一种可判定的函数依赖逻辑(LFD),它用原子局部依赖语句扩展了柱面相对化集合代数(CRS)的逻辑。它的语义可以用广义赋值模型或它们的模态对应物给出,因此该逻辑既是一阶逻辑又是模态逻辑。利用Herwig关于扩展部分同构的定理证明了LFD具有有限模型性质(FMP),并证明了LFD作为一阶逻辑片段的互模拟不变性定理。

英文摘要:

Recently, Baltag and van Benthem introduced a decidable logic of functional dependence (LFD) that extends the logic of Cylindrical Relativized Set Algebras (CRS) with atomic local dependence statements. Its semantics can be given in terms of generalised assignment models or their modal counterparts, hence the logic is both a first-order and a modal logic. We show that LFD has the finite model property (FMP) using Herwig's theorem on extending partial isomorphisms, and prove a bisimulation invariance theorem characterizing LFD as a fragment of first-order logic.

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