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S5

normal modal logic with the additional axioms ◻A→A and ◊A→◻◊A
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S5

Summary

S5 is a normal modal logic[1]. S5 draws 71 Wikipedia views per month (normal_modal_logic category, ranking #1 of 1).[2]

Key Facts

  • S5's instance of is recorded as normal modal logic[3].
  • S5's Freebase ID is recorded as /m/02x1gn6[4].
  • S5's different from is recorded as S5[5].
  • S5's Microsoft Academic ID is recorded as 135618335[6].
  • S5's Microsoft Academic ID is recorded as 192609573[7].
  • S5's OpenAlex ID is recorded as C192609573[8].

Why It Matters

S5 draws 71 Wikipedia views per month (normal_modal_logic category, ranking #1 of 1).[2] S5 has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[9]

References

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

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . Freebase Data Dumps. wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [9] ↑ . 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). S5. Retrieved May 3, 2026, from https://4ort.xyz/entity/s5
MLA “S5.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/s5.
BibTeX @misc{4ortxyz_s5_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{S5}}, year = {2026}, url = {https://4ort.xyz/entity/s5}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): S5 — https://4ort.xyz/entity/s5 (retrieved 2026-05-03)

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