Home › Entities › theorem › Seifert–van Kampen theorem

Seifert–van Kampen theorem

a theorem in topology describing the fundamental group of a space in terms of a cover of the space by two open path-connected subspaces
Intangible theorem Q372037
Press Enter · cited answer in seconds

Seifert–van Kampen theorem

Summary

Seifert–van Kampen theorem is a theorem[1]. It draws 140 Wikipedia views per month (theorem category, ranking #170 of 1,306).[2]

Key Facts

  • Seifert–van Kampen theorem's instance of is recorded as theorem[3].
  • Herbert Seifert is named after Seifert–van Kampen theorem[4].
  • Egbert van Kampen is named after Seifert–van Kampen theorem[5].
  • Seifert–van Kampen theorem's part of is recorded as list of theorems[6].
  • Seifert–van Kampen theorem's Commons category is recorded as Seifert–Van Kampen theorem[7].
  • Seifert–van Kampen theorem's Freebase ID is recorded as /m/021tpr[8].
  • Seifert–van Kampen theorem's studied by is recorded as category theory[9].
  • Seifert–van Kampen theorem's MathWorld ID is recorded as vanKampensTheorem[10].
  • Seifert–van Kampen theorem's nLab ID is recorded as van Kampen theorem[11].
  • Seifert–van Kampen theorem's maintained by WikiProject is recorded as WikiProject Mathematics[12].
  • Seifert–van Kampen theorem's Microsoft Academic ID is recorded as 190505074[13].
  • Seifert–van Kampen theorem's ProofWiki ID is recorded as Seifert-van_Kampen_Theorem[14].

Why It Matters

Seifert–van Kampen theorem draws 140 Wikipedia views per month (theorem category, ranking #170 of 1,306).[2] It has Wikipedia articles in 13 language editions, a strong signal of global cultural recognition.[15] It is known by 10 alternative names across languages and contexts.[16]

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] ↑ . Freebase Data Dumps. wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [15] ↑ . Wikidata sitelinks. wikidata.org.
  3. [16] ↑ . 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). Seifert–van Kampen theorem. Retrieved May 3, 2026, from https://4ort.xyz/entity/seifert-van-kampen-theorem
MLA “Seifert–van Kampen theorem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/seifert-van-kampen-theorem.
BibTeX @misc{4ortxyz_seifert-van-kampen-theorem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Seifert–van Kampen theorem}}, year = {2026}, url = {https://4ort.xyz/entity/seifert-van-kampen-theorem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Seifert–van Kampen theorem — https://4ort.xyz/entity/seifert-van-kampen-theorem (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/seifert-van-kampen-theorem · Last refreshed: