Intuitionistic Non-normal Modal Logics: A General Framework
Intuitionistic Non-normal Modal Logics: A General Framework
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直觉非正态模态逻辑:通用框架
DOI:
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发表时间:
2019
影响因子:
1.5
通讯作者:
N. Olivetti
中科院分区:
文献类型:
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作者:
Tiziano Dalmonte;Charles Grellois;N. Olivetti
We define a family of intuitionistic non-normal modal logics; they can be seen as intuitionistic counterparts of classical ones. We first consider monomodal logics, which contain only Necessity or Possibility. We then consider the more important case of bimodal logics, which contain both modal operators. In this case we define several interactions between Necessity and Possibility of increasing strength, although weaker than duality. We thereby obtain a lattice of 24 distinct bimodal logics. For all logics we provide both a Hilbert axiomatisation and a cut-free sequent calculus, on its basis we also prove their decidability. We then define a semantic characterisation of our logics in terms of neighbourhood models containing two distinct neighbourhood functions corresponding to the two modalities. Our semantic framework captures modularly not only our systems but also already known intuitionistic non-normal modal logics such as Constructive K (CK) and the propositional fragment of Wijesekera’s Constructive Concurrent Dynamic Logic.