EntityQ1851710· pop 11· linked from 419 articlesstructureSign in to saveset together with an interpretation of a given first-order languageConnectionssignatureEntitysemantic theory of truthEntitymathematical logicEntityfirst-order logicEntitySpringer Science+Business MediaEntityformal systemEntityclassEntityZermelo–Fraenkel set theoryEntityrecursive setEntitylogical constantEntitysemantics of logicEntityjoin and meetEntityground expressionEntitydiagramEntityNew York CityCitylogicEntityalgebraEntityBertrand RussellEntityInternational Standard Book NumberEntitynatural numberEntityCategoriesMathematical logicMathematical structuresModel theoryUniversal algebra