Title
IF Modal Logic and Classical Negation
Abstract
The present paper provides novel results on the model theory of Independence friendly modal logic. We concentrate on its particularly well-behaved fragment that was introduced in Tulenheimo and Sevenster (Advances in Modal Logic, 2006). Here we refer to this fragment as `Simple IF modal logic' (IFMLs). A model-theoretic criterion is presented which serves to tell when a formula of IFMLs is not equivalent to any formula of basic modal logic (ML). We generalize the notion of bisimulation familiar from ML; the resulting asymmetric simulation concept is used to prove that IFMLs is not closed under complementation. In fact we obtain a much stronger result: the only IFMLs formulas admitting their classical negation to be expressed in IFMLs itself are those whose truth-condition is in fact expressible in ML.
Year
DOI
Venue
2014
10.1007/s11225-012-9462-3
Studia Logica
Keywords
Field
DocType
Complementation,Expressivity,IF logic,Independence,Modal logic,Slash logic
Strict conditional,Discrete mathematics,Algebra,Accessibility relation,Normal modal logic,Algorithm,Multimodal logic,Modal logic,Mathematics,Intermediate logic,Dynamic logic (modal logic),S5
Journal
Volume
Issue
ISSN
102
1
0039-3215
Citations 
PageRank 
References 
0
0.34
9
Authors
1
Name
Order
Citations
PageRank
Tero Tulenheimo1165.19