Labelled Proofs for Quantified Modal Logic
| Author(s) : | Guido Governatori Paola Benassi Alberto Artosi Antonino Rotolo, |
| Publisher : | N/A |
| Publication Date : | 1996 |
| ISSN : | N/A |
| Abstract : | Abstract. In this paper we describe a modal proof system arising from the combination of a tableau-like classical system, which incorporates a restricted (?analytic?) version of the cut rule, with a label formalism which allows for a specialised, logic-dependent unification algorithm. The system provides a uniform proof-theoretical treatment of first-order (normal) modal logics with and without the Barcan Formula and/or its converse. 1, |