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arXiv 2008.09238cs.LOmath.LO
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逻辑诱导互模拟

Logic-Induced Bisimulations

Jim de Groot, Helle Hvid Hansen, Alexander Kurz

摘要:

对于由逻辑连接给出的共代数模态逻辑,我们定义了一个新的逻辑诱导的互模拟概念(称为$ρ$ -互模拟),并研究了它的性质。我们表明,它是结构的意义上说,它是只在定义方面的余代数结构和一步模态语义,而且,可以通过一种形式的关系提升的特点。此外,我们比较$ρ$ -互模拟几个著名的等价概念,我们证明了两个模型之间的互模拟的集合往往形成一个完整的晶格。主要的技术结果是一个Hennessy-Milner型定理,它指出,在某些条件下,逻辑等价意味着$ρ$ -双相似性。特别地,后者不依赖于函子\emph{not}(余代数的类型)和$\mathsf{L}$(给出逻辑)之间的对偶性,也不依赖于逻辑连接$ρ$的属性。

英文摘要:

We define a new logic-induced notion of bisimulation (called $ρ$-bisimulation) for coalgebraic modal logics given by a logical connection, and investigate its properties. We show that it is structural in the sense that it is defined only in terms of the coalgebra structure and the one-step modal semantics and, moreover, can be characterised by a form of relation lifting. Furthermore we compare $ρ$-bisimulations to several well-known equivalence notions, and we prove that the collection of bisimulations between two models often forms a complete lattice. The main technical result is a Hennessy-Milner type theorem which states that, under certain conditions, logical equivalence implies $ρ$-bisimilarity. In particular, the latter does \emph{not} rely on a duality between functors $\mathsf{T}$ (the type of the coalgebras) and $\mathsf{L}$ (which gives the logic), nor on properties of the logical connection $ρ$.

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