Hall's marriage theorem

theorem that a finite bipartite graph has a perfect matching iff any subset of vertices from one group has a neighbourhood of equal or greater size
Intangible theorem Q536640
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Hall's marriage theorem

Summary

Hall's marriage theorem is a theorem[1]. It draws 163 Wikipedia views per month (theorem category, ranking #153 of 1,306).[2]

Key Facts

  • Hall's marriage theorem's image is recorded as Halls theorem matching graph theory2.svg[3].
  • Hall's marriage theorem's instance of is recorded as theorem[4].
  • Philip Hall is named after Hall's marriage theorem[5].
  • Hall's marriage theorem's part of is recorded as list of theorems[6].
  • Hall's marriage theorem's Freebase ID is recorded as /m/019kt3[7].
  • Hall's marriage theorem's Encyclopædia Britannica Online ID is recorded as topic/Halls-theorem[8].
  • Hall's marriage theorem's different from is recorded as Ménage problem[9].
  • Hall's marriage theorem's studied by is recorded as graph theory[10].
  • Hall's marriage theorem's MathWorld ID is recorded as HallsTheorem[11].
  • Hall's marriage theorem's maintained by WikiProject is recorded as WikiProject Mathematics[12].
  • Hall's marriage theorem's Microsoft Academic ID is recorded as 117652263[13].
  • Hall's marriage theorem's Brilliant Wiki ID is recorded as hall-marriage-theorem[14].
  • Hall's marriage theorem's ProofWiki ID is recorded as Hall's_Marriage_Theorem[15].
  • Hall's marriage theorem's PlanetMath ID is recorded as HallsMarriageTheorem[16].
  • Hall's marriage theorem's PlanetMath ID is recorded as HallsMarriageTheoremProofOf[17].
  • Hall's marriage theorem's Metamath statement ID is recorded as marypha1[18].

Why It Matters

Hall's marriage theorem draws 163 Wikipedia views per month (theorem category, ranking #153 of 1,306).[2] It has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[19] It is known by 7 alternative names across languages and contexts.[20]

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] . Freebase Data Dumps. 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.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [19] . Wikidata sitelinks. wikidata.org.
  3. [20] . 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). Hall's marriage theorem. Retrieved May 3, 2026, from https://4ort.xyz/entity/hall-s-marriage-theorem
MLA “Hall's marriage theorem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/hall-s-marriage-theorem.
BibTeX @misc{4ortxyz_hall-s-marriage-theorem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Hall's marriage theorem}}, year = {2026}, url = {https://4ort.xyz/entity/hall-s-marriage-theorem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Hall's marriage theorem — https://4ort.xyz/entity/hall-s-marriage-theorem (retrieved 2026-05-03)

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