The standard rule of necessitation in systems of natural deduction for the modal logic S4 concludes A from A whenever all assumptions A depends on are modal formulas. This condition prevents the composability and normalization of derivations, and therefore modifications of the rule have been suggest
Bounded Properties in Modal Logic
β Scribed by George F. Schumm
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 214 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0044-3050
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π SIMILAR VOLUMES
## Abstract We consider the problem of finding, in the ambit of modal logic, a minimal characterization for finite Kripke frames, i.e., a formula which, given a frame, axiomatizes its theory employing the lowest possible number of variables and implies the other axiomatizations. We show that every
ON SOME COMPLETENESS THEOREMS IN MODAL LOGIC1) by D. MAKINSON in Oxford (England)
UPiIVERSAL FIRST-ORDER DEFINABILITY I N MODAL LOGIC by R. E. JENNIXGS and D. K. JOHNSTON in Burnaby, British Columbia (Canada) and P. K. SCHOTCH in Halifax, Nova Scotia (Canada)l) In [ l ] R. I. GOLDBLATT presents a model theoretic characterization of the class of modal sentences determined by firs
Edited By Dale Jacquette. Includes Bibliographical References And Index.