Chapter 18. Q
QBE A relational language based on domain calculus. The name is an abbreviation for Query-By-Example.
quantification Applying a quantifier (q.v.) to a free variable, thereby converting that free variable into a bound variable (see binding) and converting the predicate containing that free variable into a different predicate, logically distinct from the original. Note: If every free variable in the original predicate is quantified in this way, what results is a proposition.
quantifier See existential quantifier; universal quantifier. Note: Other quantifiers are possiblefor example, there exists exactly one of (see UNIQUE); for all but one of; there exists an odd number of; and so onbut EXISTS and FORALL are easily the ones most frequently ...
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