EntityQ671944· pop 17· linked from 391 articlestransitive setSign in to savein set theory, a set whose elements are all subsetsConnectionssemantic theory of truthEntitymathematical logicEntityfirst-order logicEntityformal systemEntityrecursive setEntitysemantics of logicEntityconstructible universeEntitystructureEntitydiagramEntityground expressionEntitymathematicsEntitylogicEntityBertrand RussellEntityInternational Standard Book NumberEntityset theoryEntityfunctionEntityJohn von NeumannEntitysetEntityaxiomEntityGeorg CantorEntityCategoriesSet theory