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retract

continuous mapping from a topological space into a subspace that preserves the position of all points in that subspace
Intangible Mathematical Concept Q2141963

Facts

4 properties
Instance of
mathematical concept
Defining formula
r\colon X \to A[3]
Different from
retraction[2]
Maintained by WikiProject
WikiProject Mathematics[4]
🏷️ Also known as
en retract en retraction ar انكماش de Retrakt de Retraktion fi retrakti fr rétraction he נסג it retrazione ja レトラクト ja 引き込み (数学) ja 絶対近傍レトラクト ko 수축 nl retractie pl retrakcja pt retrato ru Окрестностный ретракт ru ретракт ru Ретракт vi phép co
🔖 Identifiers · 7
Encyclopedia of Mathematics article ID
Retract_of_a_topological_space
Freebase ID
/m/06njj5
Google Knowledge Graph ID
/g/122chqq7, /g/12360fpm
MathWorld ID
Retract
Metamath statement ID
df-retr
Microsoft Academic ID (discontinued)
188894458
NLab ID
retract

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🔗 Connections
Created notable works 1
Tadeusz Ważewski
Maintained by WikiProject 1
WikiProject Mathematics
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Summary

retract is a mathematical concept[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . cs.vu.nl. cs.vu.nl. Provenance: wikidata.org.
  3. [4] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. 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). retract. Retrieved November 9, 2026, from https://4ort.xyz/entity/retract
MLA “retract.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Nov. 2026, https://4ort.xyz/entity/retract.
BibTeX @misc{4ortxyz_retract_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{retract}}, year = {2026}, url = {https://4ort.xyz/entity/retract}, note = {Accessed: 2026-11-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): retract — https://4ort.xyz/entity/retract (retrieved 2026-11-09)

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