Meanings
plural disjoint unions
- mathematicsA union of sets forced to be disjoint by attaching information referring to the original sets to their elements (i.e., by using indexing).
Synonyms: discriminated union
- mathematicsThe disjoint union of the underlying sets of a given family of topological spaces, equipped with a topology.
Synonyms: coproduct, direct sum, free sum, free union, topological sum
Synonyms & antonyms
nounA union of sets forced to be disjoint by attaching information referring to the original sets to their elements (i.e., by using indexing).
nounA union of sets which are already pairwise disjoint.
nounThe disjoint union of the underlying sets of a given family of topological spaces, equipped with a topology.
Translations
Icelandic sundurlæga sammengi
- sundurlæga sammengiunion of topologies
Italian unione disgiunta, unione disgiunta
- unione disgiuntaunion of sets forced to be disjoint
- unione disgiuntaunion of already disjoint sets
Swedish disjunkt union, disjunkt union
- disjunkt unionunion of sets forced to be disjoint
- disjunkt unionunion of already disjoint sets
Cite this entry
disjoint union. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/disjoint%20union
“disjoint union.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/disjoint%20union. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “disjoint union,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/disjoint%20union.
Source: disjoint union on Wiktionary, CC BY-SA 4.0.