EntityQ2859736· pop 7· linked from 50 articlestreeSign in to savepartially ordered set such that, for any element, the subset of elements less than it is well-orderedConnectionstreeEntityZermelo–Fraenkel set theoryEntitytotal orderEntitymaximal and minimal elementsEntityAronszajn treeEntityInternational Standard Book NumberEntityintegerEntityset theoryEntitydigital object identifierEntitysequenceEntitygraph theoryEntityempty setEntityellipsisEntityJSTOREntitycardinalityEntitydomain of a functionEntitycardinal numberEntityif and only ifEntityordinal numberEntitytreeEntityCategoriesSet theoryTrees (set theory)