 | S. Ramani, R. Chandrasekar, K.S.R. Anjaneyulu - 1990 - 564 דפים
...conjunction of clauses. A clause is a disjunction of literals, conveniently rewritten as a set of literals. A literal is an atomic formula or the negation of an atomic formula. An atomic formula is of the form P(t\ ..... /„), where P is a predicate symbol and t i are terms... | |
 | Andrei Voronkov - 1992 - 532 דפים
...redundancy it is of advantage to formulate inference rules in terms of (finite) multisets of formulas. A literal is an atomic formula or the negation of an atomic formula. Multisets of literals are also called clauses. Ordinary resolution operates on clauses; non-clausal... | |
 | Edward P. Stabler - 1992 - 468 דפים
...DEFINITION 17 An atomic formula is an n-ary predicate letter (n > 0) followed by n terms. DEFINITION 18 A literal is an atomic formula or the negation of an atomic formula. Literals are sometimes called positive or negative, with the obvious meaning. DEFINITION 19 A first... | |
 | Hans Kleine Büning - 1996 - 506 דפים
...t¿ are terms. Atoms and their negations are called literals. A clause is a disjunction of literals. A formula is in conjunctive normal form (CNF) if it is a conjunction of clauses. A variable is free if it is not bound by a quantifier (V or 3). A sentence is a formula not... | |
 | Elliott Mendelson - 1997 - 464 דפים
...- for example, (A /\B) V (-v4 AC), (A /\BA -.A) V (CA -.5) V (AA -,C), A, AAB, and AV(BV C). A form is in conjunctive normal form (cnf) if it is a conjunction of one or more conjuncts, each of which is a disjunction of one or more literals - for example, (BVC)/\(AVB),... | |
 | Vangalur S. Alagar, K. Periyasamy - 1998 - 458 דפים
...theorems, and consequently bottomup proofs cannot be efficiently automated. • Proof by Resolution A literal is an atomic formula or the negation of an atomic formula. In the former case the literal is positive, and in the latter case it is negative. If PJJ, for i =... | |
 | Fernando C. N. Pereira, Stuart M. Shieber - 2002 - 262 דפים
...formulas in clausal form (clauses). A formula is in clausal form if it is a disjunction of literals, where a literal is an atomic formula or the negation of an atomic formula. All variables in the disjunction are universally quantified by quantifiers whose scope includes the... | |
 | Dov M. Gabbay, Franz Guenthner - 2001 - 404 דפים
...polynomially bounded. The class and the algorithm will be of importance later. Normal forms. A formula a is in conjunctive normal form (CNF), if it is a conjunction of disjunctions of literals (that is, of prepositional variables or negated prepositional variables),... | |
 | Alain Lecomte, Francois Lamarche, Guy Perrier - 1999 - 710 דפים
...satisfiable if there exists an assignment satisfying (j> and unsatisfiable otherwise. The formula <j> is in conjunctive normal form (CNF) if it is a conjunction of clauses where a clause is a disjunction of literals. In this paper, 0 is supposed to be in CNF. SAT... | |
 | Wiebe van der Hoek - 2005 - 370 דפים
...V»[1].V«;[2] . . . V»[w].a. We usually deal with prepositional formulas in Conjunctive Normal Forms. A formula is in Conjunctive Normal Form (CNF) if it is a conjunction of zero or more clauses where by a clause we mean a disjunction of zero or more literals, ie, propositional... | |
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A literal is an atomic formula or the negation of an atomic formula, and we refer to these as being positive or negative, respectively. 
