Hilbert's fourth problem

one of twenty-three, asking to construct all metric spaces where lines resemble those on a sphere
Thing mathematical_problem Q4515035
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Hilbert's fourth problem

Summary

Hilbert's fourth problem is a mathematical problem[1]. It draws 31 Wikipedia views per month (mathematical_problem category, ranking #65 of 128).[2]

Key Facts

  • Hilbert's fourth problem's instance of is recorded as mathematical problem[3].
  • David Hilbert is named after Hilbert's fourth problem[4].
  • Hilbert's fourth problem's GND ID is recorded as 4159864-7[5].
  • Hilbert's fourth problem's part of is recorded as Hilbert's problems[6].
  • Hilbert's fourth problem's Freebase ID is recorded as /m/05cl4r[7].
  • Hilbert's fourth problem's Microsoft Academic ID is recorded as 2779509164[8].

Why It Matters

Hilbert's fourth problem draws 31 Wikipedia views per month (mathematical_problem category, ranking #65 of 128).[2] It has Wikipedia articles in 8 language editions, a strong signal of global cultural recognition.[9] It is known by 5 alternative names across languages and contexts.[10]

📑 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). Hilbert's fourth problem. Retrieved May 3, 2026, from https://4ort.xyz/entity/hilbert-s-fourth-problem
MLA “Hilbert's fourth problem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/hilbert-s-fourth-problem.
BibTeX @misc{4ortxyz_hilbert-s-fourth-problem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Hilbert's fourth problem}}, year = {2026}, url = {https://4ort.xyz/entity/hilbert-s-fourth-problem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Hilbert's fourth problem — https://4ort.xyz/entity/hilbert-s-fourth-problem (retrieved 2026-05-03)

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