disjunction functor

См. также в других словарях:

• Disjunction and existence properties — In mathematical logic, the disjunction property is satisfied by a logic if whenever a sentence is a theorem, then either ϕ is a theorem, or ψ is a theorem. The existence property or witness property is satisfied by a logic if whenever a sentence… …   Wikipedia

• Predicate functor logic — In mathematical logic, predicate functor logic (PFL) is one of several ways to express first order logic (formerly known as predicate logic) by purely algebraic means, i.e., without quantified variables. PFL employs a small number of algebraic… …   Wikipedia

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• First-order logic — is a formal logical system used in mathematics, philosophy, linguistics, and computer science. It goes by many names, including: first order predicate calculus, the lower predicate calculus, quantification theory, and predicate logic (a less… …   Wikipedia