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Illumination problem

mathematical problem
Thing mathematical_problem Q390518
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Illumination problem

Summary

Illumination problem is a mathematical problem[1]. It draws 54 Wikipedia views per month (mathematical_problem category, ranking #48 of 128).[2]

Key Facts

  • Illumination problem's image is recorded as Penrose unilluminable room.svg[3].
  • Illumination problem's instance of is recorded as mathematical problem[4].
  • lighting is named after Illumination problem[5].
  • Illumination problem's Commons category is recorded as Illumination problem[6].
  • Illumination problem's Freebase ID is recorded as /m/0g54x3m[7].
  • Illumination problem's MathWorld ID is recorded as IlluminationProblem[8].
  • Illumination problem's maintained by WikiProject is recorded as WikiProject Mathematics[9].
  • Illumination problem's Microsoft Academic ID is recorded as 2777180750[10].

Why It Matters

Illumination problem draws 54 Wikipedia views per month (mathematical_problem category, ranking #48 of 128).[2] It has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[11]

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] ↑ . Freebase Data Dumps. wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . 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). Illumination problem. Retrieved May 3, 2026, from https://4ort.xyz/entity/illumination-problem
MLA “Illumination problem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/illumination-problem.
BibTeX @misc{4ortxyz_illumination-problem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Illumination problem}}, year = {2026}, url = {https://4ort.xyz/entity/illumination-problem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Illumination problem — https://4ort.xyz/entity/illumination-problem (retrieved 2026-05-03)

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