This is a preview. Log in through your library . Abstract We investigate, for several modal logics but concentrating on KT, KD45, S4 and S5, the set of formulas B for which Ì…B is provably equivalent ...
This is a preview. Log in through your library . Journal Information The Journal of Symbolic Logic (JSL) was founded in 1936 and it has become the leading research journal in the field. It is issued ...
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