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Sommerfeld number

characteristic number of hydrodynamic bearings
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Sommerfeld number

Summary

Sommerfeld number ranks in the top 2% of general entities by monthly Wikipedia readership (80 views/month).[1]

Key Facts

  • Arnold Sommerfeld is named after Sommerfeld number[2].
  • Sommerfeld number is a type of characteristic number[3].
  • Sommerfeld number's described by source is recorded as ISO 80000-11:2019 Quantities and units — Part 11: Characteristic numbers[4].
  • Sommerfeld number's maintained by WikiProject is recorded as WikiProject Mathematics[5].
  • Sommerfeld number's recommended unit of measurement is recorded as 1[6].

Body

Definition and Type

Sommerfeld number is a type of characteristic number[3].

Origins

Arnold Sommerfeld is named after Sommerfeld number[2].

Why It Matters

Sommerfeld number ranks in the top 2% of general entities by monthly Wikipedia readership (80 views/month).[1] It has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[7]

Related Entities

Arnold Sommerfeld

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.
  5. [6] ↑ . ISO 80000-11:2019 Quantities and units — Part 11: Characteristic numbers. wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [7] ↑ . 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). Sommerfeld number. Retrieved April 10, 2026, from https://4ort.xyz/entity/sommerfeld-number
MLA “Sommerfeld number.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/sommerfeld-number.
BibTeX @misc{4ortxyz_sommerfeld-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Sommerfeld number}}, year = {2026}, url = {https://4ort.xyz/entity/sommerfeld-number}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Sommerfeld number — https://4ort.xyz/entity/sommerfeld-number (retrieved 2026-04-10)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 6d ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 1NvKLW
    Named after → —
    Recommended unit of measurement → 1
    Described by source → ISO 80000-11:2019 Quantities and units — Part 11: Characteristic numbers
    + 5 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.