EntityQ597663· pop 21· linked from 350 articlesuniverseSign in to savein set theory, a set large enough such that most ordinary mathematical constructions can take place within itConnectionssemantic theory of truthEntityset theoryEntitymathematical logicEntityintersectionEntityelementEntityordinal numberEntityfirst-order logicEntityformal systemEntityclassEntityrecursive setEntityBoolean algebraEntitysemantics of logicEntityPer Martin-LöfEntitystructureEntityconstruction of the real numbersEntityjoin and meetEntityground expressionEntitydiagramEntitymathematicsEntitylogicEntityCategoriesFamilies of setsMathematical logicSet theory