EntityQ877149· pop 12· linked from 372 articleselementary equivalenceSign in to saveConcept in model theoryConnectionsfirst-order logicEntitysemantic theory of truthEntitymathematical logicEntityPeano axiomsEntityformal systemEntityrecursive setEntitylarge cardinalEntitysemantics of logicEntitysignatureEntitystructureEntitydiagramEntityground expressionEntitylogicEntityInternational Standard Book NumberEntityset theoryEntityfunctionEntityreal numberEntityrational numberEntitysetEntityaxiomEntityCategoriesEquivalence (mathematics)Mathematical logicModel theory