A method for constructing a compound formula from given formulas, such that the truth value of the compound formula is completely determined by the truth values of the subformulas. Examples of logical operations are conjunction; disjunction; implication; and negation. Quantifiers (cf. Quantifier) are also related to logical operations.
Logical operation. V.E. Plisko (originator), Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Logical_operation&oldid=17868