Titlebook: ;

大漩涡

帐单

Modeling Reality with Mathematicsor .-unification. The concept of .-unification comes up naturally when we apply the Skolem-Herbrand-Gödel theorem to a set of universal Horn clauses with equality, in order to reduce unsatisfiability in the first-order case to unsatisfiability in the ground case. Recall that this theorem states that

跑过

极肥胖

Introduction,which are important in computer science. In the context of programming languages, a definite clause of the form ..,..., .. is viewed as a definition of the procedure . in terms of the subprocedures ..,...,.., and a negative clause of the form ← ..,..., .., is viewed as a sequence of procedure calls.

Malleable

Preliminaries,attempts to be as concise as possible, and the reader is referred to a standard text in logic, such as Gallier [25], for a more thorough presentation. Lloyd [62] or Apt [2] is the accepted introduction to the theory of logic programming. The reader is invited to skip this chapter if and until it is

认为

Bronchial-Tubes

厨师

Soundness and Completeness Results I,ll follow the following guideline in showing these results. First, the method in the ground case is presented and proved complete. Then first-order extension outlined in the previous chapter is shown to be complete by appealing to the completeness of the ground case and the Skolem-Herbrand-Gödel the

TOXIN

An Equational Extension,e is the so-called problem of equality and functions. The underlying deduction mechanism for Prolog, .-resolution, is defined only for languages without equality. As mentioned in chapter 1, current Prolog systems include a collection of interpretations of the equality symbol which are basically inhe

迅速飞过

The ,, Refutation Method,or .-unification. The concept of .-unification comes up naturally when we apply the Skolem-Herbrand-Gödel theorem to a set of universal Horn clauses with equality, in order to reduce unsatisfiability in the first-order case to unsatisfiability in the ground case. Recall that this theorem states that