Hilbert space

inner product space that is metrically complete; a Banach space whose norm induces an inner product (follows the parallelogram identity)
Intangible mathematical_concept Q190056
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Summary

Hilbert space is a mathematical concept[1]. It ranks in the top 0.79% of mathematical concept entities by monthly Wikipedia readership (10,714 views/month, #8 of 1,007).[2]

Key Facts

  • Named after: David Hilbert[3]
  • Subclass of: uniformly convex space[4], inner product space[5], Hilbert manifold[6], Banach space[7]
  • Commons category: Hilbert space[8]
  • Topic's main category: Category:Hilbert spaces[9]
  • Described by source: Armenian Soviet Encyclopedia, vol. 6[10]
  • Topic has template: Template:Hilbert space[11]
  • Stack Exchange tag: https://mathoverflow.net/tags/hilbert-spaces[12], https://math.stackexchange.com/tags/hilbert-spaces[13], https://physics.stackexchange.com/tags/hilbert-space[14], https://quantumcomputing.stackexchange.com/tags/hilbert-space[15]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[16]
  • Maintained by WikiProject: WikiProject Mathematics[17]

Body

Influence

Things named for Hilbert space include Hilbert manifold[18].

Why It Matters

Hilbert space has Wikipedia articles in 28 language editions, a strong signal of global cultural recognition.[19] It is known by 59 alternative names across languages and contexts.[20]

Entities named for it include Hilbert manifold[18].

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.

Inverse relationships (entities pointing at this one)

  1. [18] ↑ . wikidata.org. → on this site

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). Hilbert space. Retrieved October 14, 2026, from https://4ort.xyz/entity/hilbert-space
MLA “Hilbert space.” 4ort.xyz Knowledge Graph, 4ort.xyz, 14 Oct. 2026, https://4ort.xyz/entity/hilbert-space.
BibTeX @misc{4ortxyz_hilbert-space_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Hilbert space}}, year = {2026}, url = {https://4ort.xyz/entity/hilbert-space}, note = {Accessed: 2026-10-14}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Hilbert space — https://4ort.xyz/entity/hilbert-space (retrieved 2026-10-14)

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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. 18w ago · Jindřich Rubeš · 2026-06-11 view diff on Wikidata ↗
    Svkkl authority id → 0236514-Hilbertovy-prostory
    "/* wbcreateclaim-create:1| */ Svkkl authority id: 0236514-Hilbertovy-prostory, [[:toollabs:quickstatements/#/batch/259494|batch #259494]]"
  2. 21w ago · Twofivesixbot bot · 2026-05-18 view diff on Wikidata ↗
    Subclass of → uniformly convex space, inner product space, Hilbert manifold +1
    Instance of → —
    Instance of → mathematical concept
    Named after → —
    + 8 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|3 */ Yso id: 27794, mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.