John Casey

Irish geometer (1820–1891)
Person human Q1699566
John Casey
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John Casey

Summary

John Casey is a human[1]. He was born in Coolattin[2]. He was born on May 12, 1820[3]. He died in Dublin[4]. He died on January 3, 1891[5]. He worked as a mathematician[6], university teacher[7], and teacher[8]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (3 views/month, #7,299 of 1,000,298).[9]

Key Facts

  • John Casey's place of birth was Coolattin[2].
  • John Casey passed away in Dublin[4].
  • John Casey was born on May 12, 1820[3].
  • John Casey died on January 3, 1891[5].
  • Burial took place at Glasnevin Cemetery[10].
  • John Casey held citizenship in Ireland[11].
  • John Casey's professions included mathematician[6].
  • John Casey worked as a university teacher[7].
  • John Casey worked as a teacher[8].
  • John Casey's field of work was geometry[12].
  • John Casey's field of work was mathematics[13].
  • John Casey's field of work was Euclidean geometry[14].
  • John Casey's field of work was disk[15].
  • John Casey's field of work was circle[16].
  • John Casey's field of work was triangle[17].
  • John Casey was employed by Messenger of Mathematics[18].
  • John Casey was employed by Kingstown School[19].
  • Among John Casey's employers was Catholic University of Ireland[20].
  • John Casey was employed by Royal University of Ireland[21].
  • John Casey was educated at Trinity College, Dublin[22].
  • A notable work attributed to John Casey is Casey’s theorem[23].
  • John Casey received the Fellow of the Royal Society[24].
  • John Casey received the Cunningham Medal[25].
  • John Casey was a member of Royal Society[26].
  • John Casey was a member of Royal Irish Academy[27].

Body

Origins and Family

Born in Coolattin[2], John Casey… he was born on May 12, 1820[3].

Education

John Casey was educated at Trinity College, Dublin[22].

Career and Affiliations

Recorded occupations include mathematician[6], university teacher[7], and teacher[8]. Fields of work include geometry[12], a branch of mathematics[28]; mathematics[13], an academic discipline[29]; Euclidean geometry[14], a branch of mathematics[30]; disk[15], a geometric shape[31]; circle[16], a shape[32]; and triangle[17], a geometric shape[33]. Employers include Messenger of Mathematics[18], a scientific journal[34], founded in 1862[35]; Kingstown School[19]; Catholic University of Ireland[20], a university[36], in Ireland[37], founded in 1854[38]; and Royal University of Ireland[21], a collegiate university[39], in United Kingdom[40], founded in 1880[41].

Works and Contributions

A notable work attributed to John Casey is Casey’s theorem[23]. Things named for him include Casey’s theorem[42], a theorem[43].

Recognition

Awards received include Fellow of the Royal Society[24], a fellowship award[44], in United Kingdom[45] and Cunningham Medal[25], a science award[46], in Ireland[47], founded in 1796[48].

Death and Burial

John Casey died on January 3, 1891[5]. He passed away in Dublin[4]. Burial took place at Glasnevin Cemetery[10].

Why It Matters

John Casey ranks in the top 0.73% of human entities by monthly Wikipedia readership (3 views/month, #7,299 of 1,000,298).[9] He has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[49] He is known by 6 alternative names across languages and contexts.[50]

Entities named for him include Casey’s theorem[42], a theorem[43].

FAQs

Where was John Casey born?

John Casey was born in Coolattin[2].

Where did John Casey die?

John Casey died in Dublin[4].

What did John Casey do for work?

John Casey worked as mathematician[6], university teacher[7], and teacher[8].

Where did John Casey go to school?

John Casey was educated at Trinity College, Dublin[22].

What awards did John Casey receive?

Honors received include Fellow of the Royal Society[24] and Cunningham Medal[25].

References

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

Direct Wikidata claims

  1. [2] . MacTutor History of Mathematics archive. wikidata.org.
  2. [4] . MacTutor History of Mathematics archive. wikidata.org.
  3. [11] . wikidata.org.
  4. [22] . MacTutor History of Mathematics archive. wikidata.org.
  5. [12] . wikidata.org.
  6. [13] . Czech National Authority Database. Retrieved . wikidata.org.
  7. [14] . Czech National Authority Database. Retrieved . wikidata.org.
  8. [15] . Czech National Authority Database. Retrieved . wikidata.org.
  9. [16] . Czech National Authority Database. Retrieved . wikidata.org.
  10. [17] . Czech National Authority Database. Retrieved . wikidata.org.
  11. [6] . wikidata.org.
  12. [7] . Czech National Authority Database. Retrieved . wikidata.org.
  13. [8] . Czech National Authority Database. Retrieved . wikidata.org.
  14. [18] . MacTutor History of Mathematics archive. wikidata.org.
  15. [19] . MacTutor History of Mathematics archive. wikidata.org.
  16. [20] . MacTutor History of Mathematics archive. wikidata.org.
  17. [21] . MacTutor History of Mathematics archive. wikidata.org.
  18. [10] . dctrust.ie. dctrust.ie. Provenance: wikidata.org.
  19. [24] . MacTutor History of Mathematics archive. wikidata.org.
  20. [25] . wikidata.org.
  21. [26] . wikidata.org.
  22. [27] . MacTutor History of Mathematics archive. wikidata.org.
  23. [3] . MacTutor History of Mathematics archive. Retrieved . wikidata.org.
  24. [5] . MacTutor History of Mathematics archive. Retrieved . wikidata.org.
  25. [23] . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [42] . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site
  2. [29] . Wikidata. wikidata.org. → on this site
  3. [30] . Wikidata. wikidata.org. → on this site
  4. [31] . Wikidata. wikidata.org. → on this site
  5. [32] . Wikidata. wikidata.org. → on this site
  6. [33] . Wikidata. wikidata.org. → on this site
  7. [34] . Wikidata. wikidata.org. → on this site
  8. [35] . Wikidata. wikidata.org. → on this site
  9. [36] . Wikidata. wikidata.org. → on this site
  10. [37] . Wikidata. wikidata.org. → on this site
  11. [38] . Wikidata. wikidata.org. → on this site
  12. [39] . Wikidata. wikidata.org. → on this site
  13. [40] . Wikidata. wikidata.org. → on this site
  14. [41] . Wikidata. wikidata.org. → on this site
  15. [44] . Wikidata. wikidata.org. → on this site
  16. [45] . Wikidata. wikidata.org. → on this site
  17. [46] . Wikidata. wikidata.org. → on this site
  18. [47] . Wikidata. wikidata.org. → on this site
  19. [48] . Wikidata. wikidata.org. → on this site
  20. [43] . Wikidata. wikidata.org. → on this site

Class ancestry

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

Aggregate / graph-position facts

  1. [9] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [49] . Wikidata sitelinks. wikidata.org.
  3. [50] . 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). John Casey. Retrieved April 11, 2026, from https://4ort.xyz/entity/john-casey
MLA “John Casey.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Apr. 2026, https://4ort.xyz/entity/john-casey.
BibTeX @misc{4ortxyz_john-casey_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{John Casey}}, year = {2026}, url = {https://4ort.xyz/entity/john-casey}, note = {Accessed: 2026-04-11}}
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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. 16d ago · Epìdosis · 2026-05-12 view diff on Wikidata ↗
    Educated at
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    + 26 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/30846|batch #30846]]: match CERL IDs on the basis of GND (4)"
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