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presheaf

contravariant functor to the category of sets and functions
Thing functor Q7241077
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presheaf

Summary

presheaf is a functor[1]. presheaf draws 94 Wikipedia views per month (functor category, ranking #2 of 3).[2]

Key Facts

  • presheaf's instance of is recorded as functor[3].
  • presheaf's subclass of is recorded as functor[4].
  • presheaf's Freebase ID is recorded as /m/0cqf5s[5].
  • presheaf's studied by is recorded as theory of presheaves[6].
  • presheaf's MathWorld ID is recorded as Presheaf[7].
  • presheaf's nLab ID is recorded as presheaf[8].
  • presheaf's maintained by WikiProject is recorded as WikiProject Mathematics[9].
  • presheaf's Microsoft Academic ID is recorded as 28795582[10].
  • presheaf's ProofWiki ID is recorded as Definition:Presheaf_on_Topological_Space[11].
  • presheaf's Encyclopedia of Mathematics article ID is recorded as Pre-sheaf[12].
  • presheaf's ScienceDirect topic ID is recorded as mathematics/presheaf[13].

Why It Matters

presheaf draws 94 Wikipedia views per month (functor category, ranking #2 of 3).[2] presheaf has Wikipedia articles in 14 language editions, a strong signal of global cultural recognition.[14]

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] ↑ . Freebase Data Dumps. 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.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [14] ↑ . Wikidata sitelinks. 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). presheaf. Retrieved May 3, 2026, from https://4ort.xyz/entity/presheaf
MLA “presheaf.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/presheaf.
BibTeX @misc{4ortxyz_presheaf_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{presheaf}}, year = {2026}, url = {https://4ort.xyz/entity/presheaf}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): presheaf — https://4ort.xyz/entity/presheaf (retrieved 2026-05-03)

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