EntityQ2509500· pop 12· linked from 355 articlessentenceSign in to savein mathematical logic, a well-formed formula with no free variablesConnectionssemantic theory of truthEntitytheoremEntitymathematical logicEntitypropositionEntityfirst-order logicEntityformal systemEntitypredicateEntityrecursive setEntitysemantics of logicEntitystructureEntityground expressionEntitydiagramEntityNew York CityCitylogicEntityInternational Standard Book NumberEntitycomplex numberEntityset theoryEntityfunctionEntityreal numberEntitysetEntityCategoriesMathematical logicPredicate logicPropositions