Home › Entities › general › sigma-ring

sigma-ring

Family closed under countable unions and relative complements
Thing general Q3123369
Press Enter · cited answer in seconds

sigma-ring

Summary

sigma-ring ranks in the top 2% of general entities by monthly Wikipedia readership (27 views/month).[1]

Key Facts

  • sigma-ring's subclass of is recorded as set system[2].
  • sigma-ring's Freebase ID is recorded as /m/0gxh7s[3].
  • sigma-ring's Microsoft Academic ID is recorded as 12205688[4].

Why It Matters

sigma-ring ranks in the top 2% of general entities by monthly Wikipedia readership (27 views/month).[1] sigma-ring has Wikipedia articles in 8 language editions, a strong signal of global cultural recognition.[5] sigma-ring is known by 6 alternative names across languages and contexts.[6]

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . Freebase Data Dumps. wikidata.org.
  3. [4] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [5] ↑ . Wikidata sitelinks. wikidata.org.
  3. [6] ↑ . 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). sigma-ring. Retrieved April 11, 2026, from https://4ort.xyz/entity/sigma-ring
MLA “sigma-ring.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Apr. 2026, https://4ort.xyz/entity/sigma-ring.
BibTeX @misc{4ortxyz_sigma-ring_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{sigma-ring}}, year = {2026}, url = {https://4ort.xyz/entity/sigma-ring}, note = {Accessed: 2026-04-11}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): sigma-ring — https://4ort.xyz/entity/sigma-ring (retrieved 2026-04-11)

Canonical URL: https://4ort.xyz/entity/sigma-ring · Last refreshed: