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Erschienen in:
2011 | OriginalPaper | Buchkapitel
Grounding Formulas with Complex Terms
verfasst von : Amir Aavani, Xiongnan (Newman) Wu, Eugenia Ternovska, David Mitchell
Erschienen in: Advances in Artificial Intelligence
Verlag: Springer Berlin Heidelberg
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Given a finite domain, grounding is the the process of creating a variable-free first-order formula equivalent to a first-order sentence. As the first-order sentences can be used to describe a combinatorial search problem, efficient grounding algorithms would help in solving such problems effectively and makes advanced solver technology (such as SAT) accessible to a wider variety of users. One promising method for grounding is based on the relational algebra from the field of Database research. In this paper, we describe the extension of this method to ground formulas of first-order logic extended with arithmetic, expansion functions and aggregate operators. Our method allows choice of particular CNF representations for complex constraints, easily.