arithmetical hierarchy

hierarchy which classifies certain sets based on the complexity of formulas that define them
Thing hierarchical_classification Q669094
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arithmetical hierarchy

Summary

arithmetical hierarchy is a hierarchical classification[1]. It draws 98 Wikipedia views per month (hierarchical_classification category, ranking #2 of 4).[2]

Key Facts

  • arithmetical hierarchy is the creator of Stephen Cole Kleene[3].
  • arithmetical hierarchy's instance of is recorded as hierarchical classification[4].
  • Stephen Cole Kleene is named after arithmetical hierarchy[5].
  • Andrzej Mostowski is named after arithmetical hierarchy[6].
  • arithmetical hierarchy's Freebase ID is recorded as /m/019h3l[7].
  • arithmetical hierarchy's different from is recorded as polynomial hierarchy[8].
  • arithmetical hierarchy's studied by is recorded as computational complexity theory[9].
  • arithmetical hierarchy's schematic is recorded as Arithmetic hierarchy.svg[10].
  • arithmetical hierarchy's Microsoft Academic ID is recorded as 7111173[11].
  • arithmetical hierarchy's items classified is recorded as complexity class[12].

Body

Works and Contributions

arithmetical hierarchy is the creator of Stephen Cole Kleene[3].

Why It Matters

arithmetical hierarchy draws 98 Wikipedia views per month (hierarchical_classification category, ranking #2 of 4).[2] It has Wikipedia articles in 9 language editions, a strong signal of global cultural recognition.[13] It is known by 7 alternative names across languages and contexts.[14]

References

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

Direct Wikidata claims

  1. [4] . wikidata.org.
  2. [5] . wikidata.org.
  3. [6] . wikidata.org.
  4. [3] . wikidata.org.
  5. [7] . Freebase Data Dumps. wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [13] . Wikidata sitelinks. wikidata.org.
  3. [14] . 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). arithmetical hierarchy. Retrieved May 3, 2026, from https://4ort.xyz/entity/arithmetical-hierarchy
MLA “arithmetical hierarchy.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/arithmetical-hierarchy.
BibTeX @misc{4ortxyz_arithmetical-hierarchy_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{arithmetical hierarchy}}, year = {2026}, url = {https://4ort.xyz/entity/arithmetical-hierarchy}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): arithmetical hierarchy — https://4ort.xyz/entity/arithmetical-hierarchy (retrieved 2026-05-03)

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