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Classical modal logic

In modal logic, a classical modal logic L is any modal logic containing (as axiom or theorem) the duality of the modal operators which is also closed… 
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Papers overview

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2015
2015
The language of intuitionistic epistemic logic, IEL [3], captures basic reasoning about intuitionistic knowledge and belief, but… 
2013
2013
A famous result, conjectured by Godel in 1932 and proved by McKinsey and Tarski in 1948, says that $\varphi$ is a theorem of… 
2009
2009
This paper proposes a natural deduction system CNDS4 for classical S4 modal logic with necessity and possibility modalities. This… 
2007
2007
We consider a family of noncongruential modal logics obtained by restricting the smallest classical modal logic E and some of its… 
2005
2005
The paper focuses on extending to the first order case the semantical program for modalities first introduced by Dana Scott and… 
2003
2003
This paper presents a neighborhood semantics for logics of entailment. It begins with a minimal system Min that expresses the… 
2001
2001
This paper is devoted to study an extension of intuitionistic modal logic introduced by Fischer-Servi [6] by means of Lemmon… 
1998
1998
Building on recent model theoretic results for Since-Until logics we define an adequate notion of bisimulation and establish… 
1974
1974
and thus reduce such a modal system into the so-called "The Trivial System"—that is, into an assertoric one with the redundant…