Horn clause

clause (a disjunction of literals) with at most one positive, i.e. unnegated, literal
Thing general Q933932
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Horn clause

Summary

Horn clause ranks in the top 2% of general entities by monthly Wikipedia readership (100 views/month).[1]

Key Facts

  • Alfred Horn is named after Horn clause[2].
  • Horn clause's subclass of is recorded as clause[3].
  • Horn clause's Freebase ID is recorded as /m/01x73c[4].
  • Horn clause's studied by is recorded as Boolean algebra[5].
  • Horn clause's MathWorld ID is recorded as HornClause[6].
  • Horn clause's maintained by WikiProject is recorded as WikiProject Mathematics[7].
  • Horn clause's Microsoft Academic ID is recorded as 189790780[8].
  • Horn clause's Encyclopedia of Mathematics article ID is recorded as Quasi-identity[9].
  • Horn clause's PlanetMath ID is recorded as HornClause[10].
  • Horn clause's Treccani's Enciclopedia della Matematica ID is recorded as clausola-di-horn[11].
  • Horn clause's OpenAlex ID is recorded as C189790780[12].
  • Horn clause's Encyclopedia of China is recorded as 52536[13].
  • Horn clause's FOLDOC ID is recorded as Horn+clause[14].

Why It Matters

Horn clause ranks in the top 2% of general entities by monthly Wikipedia readership (100 views/month).[1] It has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[15] It is known by 14 alternative names across languages and contexts.[16]

References

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

Direct Wikidata claims

  1. [2] . wikidata.org.
  2. [3] . wikidata.org.
  3. [4] . Freebase Data Dumps. wikidata.org.
  4. [5] . wikidata.org.
  5. [6] . wikidata.org.
  6. [7] . wikidata.org.
  7. [8] . wikidata.org.
  8. [9] . wikidata.org.
  9. [10] . wikidata.org.
  10. [11] . wikidata.org.
  11. [12] . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.
  12. [13] . wikidata.org.
  13. [14] . wikidata.org.

Aggregate / graph-position facts

  1. [1] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [15] . Wikidata sitelinks. wikidata.org.
  3. [16] . 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). Horn clause. Retrieved April 10, 2026, from https://4ort.xyz/entity/horn-clause
MLA “Horn clause.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/horn-clause.
BibTeX @misc{4ortxyz_horn-clause_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Horn clause}}, year = {2026}, url = {https://4ort.xyz/entity/horn-clause}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Horn clause — https://4ort.xyz/entity/horn-clause (retrieved 2026-04-10)

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