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Published in:
2011 | OriginalPaper | Chapter
The Modal Logic of Equilibrium Models
Authors : Luis Fariñas del Cerro, Andreas Herzig
Published in: Frontiers of Combining Systems
Publisher: Springer Berlin Heidelberg
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Here-and-there models and equilibrium models were investigated as a semantical framework for answer set programming by Pearce, Cabalar, Lifschitz, Ferraris and others. The semantics of equilibrium logic is indirect in that the notion of satisfiability is defined in terms of satisfiability in the logic of here-and-there. We here give a direct semantics of equilibrium logic, stated in terms of a modal language into which the language of equilibrium logic can be embedded.