Isabelle

higher-order logic (HOL) automated theorem prover
CreativeWork proof_assistant Q460340
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Isabelle

Summary

Isabelle is a proof assistant[1]. Isabelle draws 185 Wikipedia views per month (proof_assistant category, ranking #2 of 6).[2]

Key Facts

  • Isabelle's image is recorded as Isabelle jedit.png[3].
  • Isabelle's instance of is recorded as proof assistant[4].
  • Isabelle's instance of is recorded as free software[5].
  • Isabelle's developer is recorded as Technical University of Munich[6].
  • Isabelle's developer is recorded as University of Cambridge[7].
  • Isabelle's copyright license is recorded as BSD licenses[8].
  • Isabelle's programmed in is recorded as Standard ML[9].
  • Isabelle's programmed in is recorded as Scala[10].
  • Isabelle's operating system is recorded as Q3251801[11].
  • Isabelle's operating system is recorded as Microsoft Windows[12].
  • Isabelle's operating system is recorded as macOS[13].
  • Isabelle's has use is recorded as mathematics[14].
  • +1986-00-00T00:00:00Z marks the founding of Isabelle[15].
  • Isabelle's Freebase ID is recorded as /m/015gp5[16].
  • Isabelle's official website is recorded as http://isabelle.in.tum.de/[17].
  • Isabelle's readable file format is recorded as Isabelle file format[18].
  • Isabelle's writable file format is recorded as Isabelle file format[19].
  • Isabelle's Stack Exchange tag is recorded as https://proofassistants.stackexchange.com/tags/isabelle[20].
  • Isabelle's Stack Exchange tag is recorded as https://stackoverflow.com/tags/isabelle[21].
  • Isabelle's IRC channel URL is recorded as irc://irc.libera.chat/#isabelle[22].
  • Isabelle's Open Hub ID is recorded as isabelle[23].
  • Isabelle's nLab ID is recorded as Isabelle[24].
  • Isabelle's maintained by WikiProject is recorded as WikiProject Software[25].
  • Isabelle's copyright status is recorded as copyrighted[26].
  • Isabelle's swMATH work ID is recorded as 454[27].

Why It Matters

Isabelle draws 185 Wikipedia views per month (proof_assistant category, ranking #2 of 6).[2] Isabelle has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[28]

Isabelle has been cited as an influence by Lean[29], an open-source software[30], founded in 2013[31].

FAQs

Who did Isabelle influence?

Isabelle has been cited as an influence by Lean[29].

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  5. [7] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  6. [8] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  7. [9] . Open Hub. Retrieved . openhub.net. Provenance: wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  10. [12] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  11. [13] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . Freebase Data Dumps. wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  17. [19] . isabelle.in.tum.de. Retrieved . isabelle.in.tum.de. Provenance: wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . wikidata.org.
  20. [22] . wikidata.org.
  21. [23] . wikidata.org.
  22. [24] . wikidata.org.
  23. [25] . wikidata.org.
  24. [26] . wikidata.org.
  25. [27] . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [29] . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [30] . Wikidata. wikidata.org. → on this site
  2. [31] . Wikidata. wikidata.org. → on this site

Class ancestry

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

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] . 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). Isabelle. Retrieved May 3, 2026, from https://4ort.xyz/entity/isabelle-q460340
MLA “Isabelle.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/isabelle-q460340.
BibTeX @misc{4ortxyz_isabelle-q460340_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Isabelle}}, year = {2026}, url = {https://4ort.xyz/entity/isabelle-q460340}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Isabelle — https://4ort.xyz/entity/isabelle-q460340 (retrieved 2026-05-03)

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