union

operation denoted by symbol “∪” applied on two sets; the set of all distinct elements in the collection
Thing set_operation Q185359
union
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union

Summary

union is a set operation[1]. union draws 985 Wikipedia views per month (set_operation category, ranking #2 of 6).[2]

Key Facts

  • union's instance of is recorded as set operation[3].
  • union's instance of is recorded as binary operation[4].
  • union's instance of is recorded as union of several sets[5].
  • union is a type of connection[6].
  • union's Commons category is recorded as Union (set theory)[7].
  • union is the opposite of intersection[8].
  • union's depicted by is recorded as ∪[9].
  • union's described by source is recorded as ISO 80000-2:2019 Quantities and units — Part 2: Mathematics[10].
  • union's described by source is recorded as Q140169500[11].
  • union's has characteristic is recorded as commutative property[12].
  • union's has characteristic is recorded as associativity[13].
  • union's main Wikidata property is recorded as P2737[14].
  • union's different from is recorded as association[15].
  • union's different from is recorded as Union[16].
  • union's different from is recorded as union[17].
  • union's TeX string is recorded as \cup[18].
  • union's maintained by WikiProject is recorded as WikiProject Mathematics[19].

Body

Definition and Type

Recorded instance of include set operation[3], binary operation[4], and union of several sets[5]. union is a type of connection[6]. union is the opposite of intersection[8].

Influence

Things named for union include Unification Church[20], a new religious movement[21], in South Korea[22], founded in 1954[23], headquartered in Gapyeong County[24].

Why It Matters

union draws 985 Wikipedia views per month (set_operation category, ranking #2 of 6).[2] union has Wikipedia articles in 28 language editions, a strong signal of global cultural recognition.[25] union is known by 72 alternative names across languages and contexts.[26]

Entities named for union include Unification Church[20], a new religious movement[21], in South Korea[22], founded in 1954[23], headquartered in Gapyeong County[24].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [20] ↑ . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [21] ↑ . Wikidata. wikidata.org. → on this site
  2. [22] ↑ . Wikidata. wikidata.org. → on this site
  3. [23] ↑ . Wikidata. wikidata.org. → on this site
  4. [24] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [25] ↑ . Wikidata sitelinks. wikidata.org.
  3. [26] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). union. Retrieved May 3, 2026, from https://4ort.xyz/entity/union-q185359-2
MLA “union.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/union-q185359-2.
BibTeX @misc{4ortxyz_union-q185359-2_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{union}}, year = {2026}, url = {https://4ort.xyz/entity/union-q185359-2}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): union — https://4ort.xyz/entity/union-q185359-2 (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/union-q185359-2 · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 16d ago · A.pavliashvili · 2026-09-09 view diff on Wikidata ↗
    Different from → association, Union, union
    "/* wbsetclaim-create:2||1 */ [[Property:P1889]]: [[Q17853087]]"
  2. 21d ago · AddyLockPool · 2026-09-03 view diff on Wikidata ↗
    Described by source → ISO 80000-2:2019 Quantities and units — Part 2: Mathematics, Q140169500
    "/* wbsetclaim-create:2||1 */ [[Property:P1343]]: [[Q140169500]]"
  3. 6w ago · LadyData · 2026-08-09 view diff on Wikidata ↗
    Instance of → set operation, binary operation, union of several sets
    Different from → association, Union, union
    Maintained by wikiproject → WikiProject Mathematics
    Described by source → ISO 80000-2:2019 Quantities and units — Part 2: Mathematics, Q140169500
    + 11 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ [[Property:P11924]]: union, Matched to [[:toollabs:mix-n-match/#/entry/193891074|union (#193891074)]] in [[:toollabs:mix-n-match/#/catalog/6965|Top 10,000 IMDb keywords]] "
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.