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Abstract: Inductive Logic Programming considers almost exclusively universally quantied theories. To add expressiveness, prenex conjunctive normal forms (PCNF) with existential variables should also be considered. ILP mostly uses learning with refinement operators. To extend refinement operators to PCNF, we should first do so with substitutions. However, applying a classic substitution to a PCNF with existential variables, one often obtains a generalization rather than a specialization. In this article... (Update)
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BibTeX entry: (Update)
@article{ nienhuyscheng99generalizing,
author = "Shan-Hwei Nienhuys-Cheng and Wim Van Laer and Jan Ramon and Luc De Raedt",
title = "Generalizing Refinement Operators to Learn Prenex Conjunctive Normal Forms",
journal = "Lecture Notes in Computer Science",
volume = "1634",
pages = "245+",
year = "1999",
url = "citeseer.ist.psu.edu/article/nienhuys-cheng00generalizing.html" }
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Foundations of Inductive Logic Programming (context) - Nienhuys-Cheng, de Wolf - 1997
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Existence and nonexistence of complete refinement operators .. (context) - van der Laag, Nienhuys-Cheng - 1994
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A new formalism to integrate quantification in inductive pro.. (context) - Goncalves, Froidevaux - 1997
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