Generalization by absorption of definite clauses
نویسندگان
چکیده
منابع مشابه
Generalization of Clauses under Implication
In the area of inductive learning, generalization is a main operation, and the usual deenition of induction is based on logical implication. Recently there has been a rising interest in clausal representation of knowledge in machine learning. Almost all inductive learning systems that perform generalization of clauses use the relation-subsumption instead of implication. The main reason is that ...
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In the area of inductive learning, generalization is the main operation, and the usual definition of induction is based on logical implication. Plotkin's well-known technique for computing least general generalizations of clauses under θ-subsumption sometimes produces results which are too general with respect to implication. Muggleton has shown that this problem only occurs in one type of gene...
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In the area of inductive learning, generalization is a main operation, and the usual deenition of induction is based on logical implication. Recently there has been a rising interest in clausal representation of knowledge in machine learning. Almost all inductive learning systems that perform generalization of clauses use the relation-subsumption instead of implication. The main reason is that ...
متن کاملOn Generalization and Subsumption for Ordered Clauses
In this paper, we introduce ordered clauses as defined a sequence of literals, and investigate the properties of generalizations for ordered clauses. Furthermore, we show that the subsumption problem for ordered clauses is NP-complete, as similar as the subsumption problem for ordinal clauses. Hence, the definition that a clause is a set of literals is inessential for the intractability of subs...
متن کاملOperational Semantics of an Imperative Language in Definite Clauses
We present the “big-step” operational semantics of a small programming language NIL (Natural Imperative Language) in definite clauses, thus building on the fixpoint semantics of logic programs. NIL operates on a state which is just a sequence of counters. As basic statements NIL has incrementation, decrementation and test for null. NIL allows for sequential composition and non-deterministic cho...
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ژورنال
عنوان ژورنال: The Journal of Logic Programming
سال: 1999
ISSN: 0743-1066
DOI: 10.1016/s0743-1066(99)00016-3