We introduce the method of clausal graph tableaux at the example of hybrid logic with difference and star modalities. Clausal graph tableaux are prefix-free and terminate by construction. They provide an abstract method of establishing the small model property of modal logics. In contrast to the filtration method, clausal graph tableaux result in goal-directed decision procedures. Until now no goal-directed decision procedure for the logic considered in this paper was known. There is the promise that clausal graph tableaux lead to a new class of effective decision procedures.
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DOI (LNCS version): 10.1007/978-3-642-16242-8_30
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Wed Sep 16 10:47:00 2009