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Russell's paradox

paradox in set theory concerning the set of all sets not containing themselves
Thing paradox Q33401
Russell's paradox
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Summary

Russell's paradox is a paradox[1]. It ranks in the top 7% of paradox entities by monthly Wikipedia readership (7,415 views/month).[2]

Key Facts

  • Author: Bertrand Russell[3], Ernst Zermelo[4]
  • Discoverer or inventor: Bertrand Russell[5], Ernst Zermelo[6]
  • Named after: Bertrand Russell[7]
  • Time of discovery or invention: 1901[8]
  • Studied by: set theory[9], axiomatic set theory[10]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[11]
  • Maintained by WikiProject: WikiProject Mathematics[12]

Why It Matters

Russell's paradox has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.[13] It is known by 33 alternative names across languages and contexts.[14]

Related Entities

Bertrand Russell Ernst Zermelo

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] ↑ . Zermelo's discovery of the “Russell Paradox”. sciencedirect.com. Provenance: 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.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [13] ↑ . Wikidata sitelinks. wikidata.org.
  3. [14] ↑ . 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). Russell's paradox. Retrieved October 11, 2026, from https://4ort.xyz/entity/russell-s-paradox
MLA “Russell's paradox.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Oct. 2026, https://4ort.xyz/entity/russell-s-paradox.
BibTeX @misc{4ortxyz_russell-s-paradox_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Russell's paradox}}, year = {2026}, url = {https://4ort.xyz/entity/russell-s-paradox}, note = {Accessed: 2026-10-11}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Russell's paradox — https://4ort.xyz/entity/russell-s-paradox (retrieved 2026-10-11)

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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. 13w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    Named after → Bertrand Russell
    Local thumb → —
    Discoverer or inventor → Bertrand Russell, Ernst Zermelo
    Maintained by wikiproject → WikiProject Mathematics
    + 8 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
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