projective module

in algebra, a module that is the direct summand of a free module
Thing general Q942423
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projective module

Summary

projective module ranks in the top 2% of general entities by monthly Wikipedia readership (109 views/month).[1]

Key Facts

  • projective module's GND ID is recorded as 4175892-4[2].
  • projective module's Library of Congress authority ID is recorded as sh85107381[3].
  • projective module's subclass of is recorded as flat module[4].
  • projective module's subclass of is recorded as projective object[5].
  • projective module's opposite of is recorded as injective module[6].
  • projective module's Freebase ID is recorded as /m/01_ty9[7].
  • projective module's Stack Exchange tag is recorded as https://mathoverflow.net/tags/projective-modules[8].
  • projective module's defining formula is recorded as P\in\operatorname{ProjMod}_R\iff\exists Q\in\operatorname{Mod}_R\exists\kappa\in\operatorname{Card}\colon P\oplus Q\cong R^{\oplus\kappa}[9].
  • projective module's studied by is recorded as module theory[10].
  • projective module's MathWorld ID is recorded as ProjectiveModule[11].
  • projective module's nLab ID is recorded as projective module[12].
  • projective module's schematic is recorded as Projective module.png[13].
  • projective module's maintained by WikiProject is recorded as WikiProject Mathematics[14].
  • projective module's Microsoft Academic ID is recorded as 32268108[15].
  • projective module's ProofWiki ID is recorded as Definition:Projective_Module[16].
  • projective module's in defining formula is recorded as R[17].
  • projective module's in defining formula is recorded as P[18].
  • projective module's in defining formula is recorded as Q[19].
  • projective module's in defining formula is recorded as \kappa[20].
  • projective module's in defining formula is recorded as R^{\oplus\kappa}[21].
  • projective module's in defining formula is recorded as \oplus[22].
  • projective module's in defining formula is recorded as \iff[23].
  • projective module's in defining formula is recorded as \cong[24].
  • projective module's Encyclopedia of Mathematics article ID is recorded as Projective_module[25].
  • projective module's PlanetMath ID is recorded as ProjectiveModule[26].

Why It Matters

projective module ranks in the top 2% of general entities by monthly Wikipedia readership (109 views/month).[1] It has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[27]

References

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

Direct Wikidata claims

  1. [2] . wikidata.org.
  2. [3] . github.com. Retrieved . github.com. Provenance: wikidata.org.
  3. [4] . wikidata.org.
  4. [5] . wikidata.org.
  5. [6] . wikidata.org.
  6. [7] . Freebase Data Dumps. wikidata.org.
  7. [8] . wikidata.org.
  8. [9] . wikidata.org.
  9. [10] . wikidata.org.
  10. [11] . wikidata.org.
  11. [12] . wikidata.org.
  12. [13] . wikidata.org.
  13. [14] . wikidata.org.
  14. [15] . wikidata.org.
  15. [16] . wikidata.org.
  16. [17] . wikidata.org.
  17. [18] . wikidata.org.
  18. [19] . wikidata.org.
  19. [20] . wikidata.org.
  20. [21] . wikidata.org.
  21. [22] . wikidata.org.
  22. [23] . wikidata.org.
  23. [24] . wikidata.org.
  24. [25] . wikidata.org.
  25. [26] . wikidata.org.

Aggregate / graph-position facts

  1. [1] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [27] . 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). projective module. Retrieved April 10, 2026, from https://4ort.xyz/entity/projective-module
MLA “projective module.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/projective-module.
BibTeX @misc{4ortxyz_projective-module_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{projective module}}, year = {2026}, url = {https://4ort.xyz/entity/projective-module}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): projective module — https://4ort.xyz/entity/projective-module (retrieved 2026-04-10)

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