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- Path: sparky!uunet!psgrain!hippo!ucthpx!uctvax.uct.ac.za!naturman
- From: naturman@uctvax.uct.ac.za
- Newsgroups: sci.logic
- Subject: Re: Modal logic Correction
- Message-ID: <1992Aug28.114405.202562@uctvax.uct.ac.za>
- Date: 28 Aug 92 11:44:04 +0200
- References: <1992Aug28.114007.202560@uctvax.uct.ac.za>
- Keywords: modal logic
- Organization: University of Cape Town
- Lines: 16
-
- In article <1992Aug28.114007.202560@uctvax.uct.ac.za>,
- naturman@uctvax.uct.ac.za writes:
-
- Sorry the correct question is as follows:
-
-
- Does anyone know if the modal logic with the following axioms has been
- investigated ever?
-
- p(A v B) <=> (pA v pB)
- ppA => A v pA
-
- and with deduction rule
- from A infer nA
-
- where p is the possibilty operator and n is the necessity operator.
-