sign function

mathematical function that extracts the sign of a real number or complex number
CreativeWork wikimedia_article_covering_multiple_topics Q236813
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sign function

Summary

sign function is a Wikimedia article covering multiple topics[1]. It draws 303 Wikipedia views per month (wikimedia_article_covering_multiple_topics category, ranking #45 of 186).[2]

Key Facts

  • sign function's instance of is recorded as Wikimedia article covering multiple topics[3].
  • sign function's subclass of is recorded as function[4].
  • sign function's subclass of is recorded as odd function[5].
  • sign function's subclass of is recorded as unary function[6].
  • sign function's subclass of is recorded as idempotent function[7].
  • sign function's Commons category is recorded as Signum function[8].
  • sign function's Freebase ID is recorded as /m/02jhhy[9].
  • sign function's main subject is recorded as real sign function[10].
  • sign function's main subject is recorded as complex sign function[11].
  • sign function's different from is recorded as complex sign function[12].
  • sign function's maintained by WikiProject is recorded as WikiProject Mathematics[13].
  • sign function's ProofWiki ID is recorded as Definition:Signum_Function[14].
  • sign function's OpenAlex ID is recorded as C4250[15].
  • sign function's Metamath statement ID is recorded as df-sgn[16].

Body

Subject and Themes

Main subjects include real sign function[10] and complex it[11].

Why It Matters

sign function draws 303 Wikipedia views per month (wikimedia_article_covering_multiple_topics category, ranking #45 of 186).[2] It has Wikipedia articles in 28 language editions, a strong signal of global cultural recognition.[17] It is known by 46 alternative names across languages and contexts.[18]

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] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . Freebase Data Dumps. wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.
  14. [16] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [17] . Wikidata sitelinks. wikidata.org.
  3. [18] . 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). sign function. Retrieved May 3, 2026, from https://4ort.xyz/entity/sign-function
MLA “sign function.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/sign-function.
BibTeX @misc{4ortxyz_sign-function_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{sign function}}, year = {2026}, url = {https://4ort.xyz/entity/sign-function}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): sign function — https://4ort.xyz/entity/sign-function (retrieved 2026-05-03)

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