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Modal logic axiom S4, transitive and reflexive frame, tableaux solver

I have a difficult problem to solve which as mentioned in the title is related to modal logic axiom S4. So, here is some background knowledge that can be useful: S4 axiom is a class of transitive ...
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1answer
44 views

complexity of modal logic axioms

I am writing a paper in which I want to include complexity results for different modal logics and possibly add a reference to a specific paper. At the moment I have the following: K- no restrictions ...
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149 views

The use of modal logic in computer science [closed]

I have a tentative understanding of modal logic. Can anyone explain modal logic as it is used in computer science?
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280 views

Intuitive meaning of modal $\mu$-calculus formula

I am solving one of the past exams and I am not certain with my solution to one of the exercises. The exercise is asking to give intuitive meaning to modal $\mu$-calculus formula: $$ \phi = \mu Z. ...
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179 views

Why is GFp -> GFq false in LTL, even though GFp and GFq are false?

Consider the Kripke structure: $$ \begin{array}{ccccccc} \to & (p, \neg q) & \to & (\neg p, \neg q) & \to & (\neg p, q) \\ & \circlearrowright & & \circlearrowright ...