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A characterization of the disjunctive well-founded semantics (DWFS) is given in terms of the Gelfond–Lifschitz transformation. This characterization is used to develop a top-down method of testing DWFS membership, employing a hyperresolution-like operator and quasi-cyclic trees to handle minimal model processing. A flexible bottom-up method of computing the DWFS is also given that admits the use of...
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