Horn clause information

called a dual-Horn clause. A Horn clause with exactly one positive literal is a definite clause or a strict Horn clause; a definite clause with no negative...

Constrained Horn clauses (CHCs) are a fragment of first-order logic with applications to program verification and synthesis. Constrained Horn clauses can be...

(called a negative literal). A clause is a disjunction of literals (or a single literal). A clause is called a Horn clause if it contains at most one positive...

written in the form: ?- B1, ..., Bn. In the simplest case of Horn clauses (or "definite" clauses), all of the A, B1, ..., Bn are atomic formulae of the form...

conjunctive normal form (CNF) or clausal normal form if it is a conjunction of one or more clauses, where a clause is a disjunction of literals; otherwise...

are sets of guarded Horn clauses of the form: H :- G1, …, Gn | B1, …, Bn. The conjunction G1, … , Gn is called the guard of the clause, and | is the commitment...

doing unit propagation for all unit clauses is linear in the size of the set of clauses. Horn satisfiability Horn clause Automated theorem proving DPLL algorithm...

resolution, which is both sound and refutation complete for Horn clauses. Given a goal clause, represented as the negation of a problem to be solved : ¬...

clause while still being interpretable in the embedded clause. The second sentence is viewed as impossible because the Horn clause is a main clause,...

describe relations, defined by means of clauses. Pure Prolog is restricted to Horn clauses. Two types of Horn clauses are used to define Prolog programs:...

development of logic programming and Prolog, using SLD resolution to treat Horn clauses as goal-reduction procedures. The early development of logic programming...

project. KL1 is an implementation of Flat GHC (a subset of the Guarded Horn Clauses language by Kazunori Ueda), making it a parallelised Prolog variant....

axiomatized regular expressions as a Kleene algebra, using equational and Horn clause axioms. Already in 1964, Redko had proved that no finite set of purely...

unions of algebras" described Horn clauses and Horn sentences, which later would form the foundation of logic programming. Horn was born on Lower East Side...

compilation. On the other hand, logic programming, which combines the Horn clause subset of first-order logic with a non-monotonic form of negation, has...

theorem provers discussed below can prove theorems in first-order logic. Horn clause logic is more restricted than first-order logic and is used in logic...

Inference in both Horn clause logic and first-order logic is undecidable, and therefore intractable. However, backward reasoning with Horn clauses, which underpins...

of Women in Computing Guitar Hero Carabiner, a gaming device Guarded Horn clause, in concurrent logic programming Great Harbour Cay Airport (IATA airport...

procedure. He developed SLD resolution and the procedural interpretation of Horn clauses, which underpin the operational semantics of backward reasoning in logic...

programming techniques. Its foundation is Horn clause logic with equality, which consists of predicates and Horn clauses for logic programming, and functions...

does not require an inverse element. The conditions take the form of a Horn clause. This means that all the elements of A {\displaystyle A} are also elements...

means of clauses. Pure Prolog is restricted to Horn clauses, a Turing-complete subset of first-order predicate logic. There are two types of clauses: Facts...

reserve clause. Star players, such as Lou Boudreau and Pee Wee Reese, indicated their support of the reserve clause. Minor league veteran Ross Horning testified...

and Cybernetics. Nov./Dec. 1991. Carl Hewitt and Gul Agha. Guarded Horn clause languages: are they deductive and Logical? International Conference on...