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IMCS/Publications/BASM/Issues/BASM n.1 (35), 2001/

A criterion for parametrical completeness in the 4-valued extension of modal logic S5.

Authors: Cebotari V.

Abstract

The problem of parametrical completeness in the simplest non-classical extension of modal logic S5 is considered. The conditions permiting to determine the parametrical completeness of an arbitrary system of modal formulae in mentioned logic are established in the terms of 22 parametrical precomplete classes of formulae.