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Efficient Evaluation of Fuzzy Deduction

We describe the application of the magic sets method for efficient query evaluation of fuzzy logic programs. The logic programs considered are written in Datalog language and are processed by the deductive database system developed at the Department of Computer Science and Engineering, University of West Bohemia. Deductive system enriched with fuzzy logic is able to better serve as a knowledge system. Speeding up its execution makes this system practically useful.