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Un principe de résolution en logique modale. (French) Zbl 0566.03007
A resolution principle for the class of S5\({}^*\) formulas, which do not contain modal operators or for which the variables in the scope of a modal operator are free, is presented. Results analogous with classical ones are derived, beginning with characterizations of sets of ”clauses” by semantic trees and ending with the completeness theorem (unsatisfiability is equivalent with the existence of a refutation).
Reviewer: C.Masalagiu

MSC:
03B35 Mechanization of proofs and logical operations
03B45 Modal logic (including the logic of norms)
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References:
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