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projection

concept in relational algebra
Thing relational_algebra_operation Q3134666
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projection

Summary

projection is a relational algebra operation[1]. projection draws 42 Wikipedia views per month (relational_algebra_operation category, ranking #1 of 1).[2]

Key Facts

  • projection's instance of is recorded as relational algebra operation[3].
  • projection's instance of is recorded as unary operation[4].
  • projection's instance of is recorded as mathematical term[5].
  • projection's Freebase ID is recorded as /m/07yz3m[6].
  • projection's defining formula is recorded as \Pi_{a_1, ...,a_n}( R ) = { \ t[a_1,...,a_n] \ t \in R \ }[7].
  • projection's maintained by WikiProject is recorded as WikiProject Mathematics[8].
  • projection's Microsoft Academic ID is recorded as 57493831[9].
  • projection's OpenAlex ID is recorded as C57493831[10].

Why It Matters

projection draws 42 Wikipedia views per month (relational_algebra_operation category, ranking #1 of 1).[2] projection has Wikipedia articles in 6 language editions, a strong signal of global cultural recognition.[11]

Related Entities

SPARQL 1.1 SPARQL 1.1 Query Language

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] ↑ . Freebase Data Dumps. wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [11] ↑ . 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). projection. Retrieved May 3, 2026, from https://4ort.xyz/entity/projection-q3134666
MLA “projection.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/projection-q3134666.
BibTeX @misc{4ortxyz_projection-q3134666_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{projection}}, year = {2026}, url = {https://4ort.xyz/entity/projection-q3134666}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): projection — https://4ort.xyz/entity/projection-q3134666 (retrieved 2026-05-03)

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