Hahn–Banach theorem

theorem on extension of bounded linear functionals
Intangible theorem Q866116
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Hahn–Banach theorem

Summary

Hahn–Banach theorem is a theorem[1]. It draws 108 Wikipedia views per month (theorem category, ranking #172 of 1,306).[2]

Key Facts

  • Hahn–Banach theorem's instance of is recorded as theorem[3].
  • Hans Hahn is named after Hahn–Banach theorem[4].
  • Stefan Banach is named after Hahn–Banach theorem[5].
  • Hahn–Banach theorem's part of is recorded as list of theorems[6].
  • Hahn–Banach theorem's Freebase ID is recorded as /m/03lqy[7].
  • Hahn–Banach theorem's PSH ID is recorded as 7650[8].
  • Hahn–Banach theorem's MathWorld ID is recorded as Hahn-BanachTheorem[9].
  • Hahn–Banach theorem's NE.se ID is recorded as hahn-banachs-sats[10].
  • Hahn–Banach theorem's maintained by WikiProject is recorded as WikiProject Mathematics[11].
  • Hahn–Banach theorem's Microsoft Academic ID is recorded as 162315781[12].
  • Hahn–Banach theorem's Encyclopedia of Mathematics article ID is recorded as Hahn-Banach_theorem[13].
  • Hahn–Banach theorem's Lex ID is recorded as Hahn-Banachs_sætning[14].
  • Hahn–Banach theorem's ScienceDirect topic ID is recorded as mathematics/hahn-banach-theorem[15].

Why It Matters

Hahn–Banach theorem draws 108 Wikipedia views per month (theorem category, ranking #172 of 1,306).[2] It has Wikipedia articles in 20 language editions, a strong signal of global cultural recognition.[16] It is known by 10 alternative names across languages and contexts.[17]

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.

Class ancestry

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

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [16] . Wikidata sitelinks. wikidata.org.
  3. [17] . 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). Hahn–Banach theorem. Retrieved May 3, 2026, from https://4ort.xyz/entity/hahn-banach-theorem
MLA “Hahn–Banach theorem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/hahn-banach-theorem.
BibTeX @misc{4ortxyz_hahn-banach-theorem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Hahn–Banach theorem}}, year = {2026}, url = {https://4ort.xyz/entity/hahn-banach-theorem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Hahn–Banach theorem — https://4ort.xyz/entity/hahn-banach-theorem (retrieved 2026-05-03)

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