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Wagner's theorem

characterization theorem in graph theory of planar graphs
Intangible Theorem Q7959587

Facts

5 properties
Instance of
theorem
Part of
list of theorems[3]
Maintained by WikiProject
WikiProject Mathematics[5]
Named after
Klaus Wagner[2]
Statement describes
planar graph[4]
🏷️ Also known as
en Wagner's theorem de Satz von Wagner es teorema de Wagner hu Wagner-tétel ru теорема Вагнера tr Wagner teoremi zh 瓦格納定理
🔖 Identifiers · 2
Freebase ID
/m/0pl1ytk
Microsoft Academic ID (discontinued)
2778996145

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🔗 Connections
Instance of 1
theorem
Maintained by WikiProject 1
WikiProject Mathematics
Named after 1
Klaus Wagner
Part of 1
list of theorems
Statement describes 1
planar graph
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Summary

Wagner's theorem is a theorem[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

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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). Wagner's theorem. Retrieved November 6, 2026, from https://4ort.xyz/entity/wagner-s-theorem
MLA “Wagner's theorem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 6 Nov. 2026, https://4ort.xyz/entity/wagner-s-theorem.
BibTeX @misc{4ortxyz_wagner-s-theorem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Wagner's theorem}}, year = {2026}, url = {https://4ort.xyz/entity/wagner-s-theorem}, note = {Accessed: 2026-11-06}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Wagner's theorem — https://4ort.xyz/entity/wagner-s-theorem (retrieved 2026-11-06)

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