Thomas Clausen

Danish mathematician and astronomer (1801–1885)
Person human Q541571
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Thomas Clausen

Summary

Thomas Clausen is a human[1]. His place of birth was Sønderborg[2]. He was born on +1801-01-16T00:00:00Z[3]. He died in Tartu[4]. He died on +1885-05-24T00:00:00Z[5]. He worked as a mathematician[6] and astronomer[7]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (8 views/month, #7,293 of 1,000,298).[8]

Key Facts

  • Born in Sønderborg[2], Thomas Clausen…
  • Thomas Clausen was born in Øster Snogbæk[9].
  • Thomas Clausen died in Tartu[4].
  • Thomas Clausen was born on +1801-01-16T00:00:00Z[3].
  • Thomas Clausen died on +1885-05-24T00:00:00Z[5].
  • Thomas Clausen died on +1885-05-23T00:00:00Z[10].
  • Burial took place at Raadi cemetery[11].
  • Thomas Clausen held citizenship in Duchy of Schleswig[12].
  • Thomas Clausen worked as a mathematician[6].
  • Thomas Clausen's professions included astronomer[7].
  • Thomas Clausen's field of work was mathematics[13].
  • Thomas Clausen's field of work was astronomy[14].
  • Among Thomas Clausen's employers was Imperial University of Dorpat[15].
  • Thomas Clausen was employed by Altona Observatory[16].
  • Among Thomas Clausen's employers was Utzschneider Optical Institute[17].
  • A notable work attributed to Thomas Clausen is Bestimmung der Bahn des Cometen von 1770[18].
  • A notable work attributed to Thomas Clausen is Clausen's formula[19].
  • A notable work attributed to Thomas Clausen is Von Staudt–Clausen theorem[20].
  • A notable work attributed to Thomas Clausen is Clausen function[21].
  • Thomas Clausen received the honorary doctor of the University of Königsberg[22].
  • Thomas Clausen was a member of Göttingen Academy of Sciences and Humanities in Lower Saxony[23].
  • Thomas Clausen's image is recorded as Thomas Clausen.jpg[24].
  • Thomas Clausen is recorded as male[25].
  • Thomas Clausen's instance of is recorded as human[26].
  • Thomas Clausen supervised Ludwig Schwarz as a doctoral student[27].

Body

Origins and Family

Recorded place of birth include Sønderborg[2], a city[28], in Denmark[29] and Øster Snogbæk[9], a village[30], in Denmark[31]. Thomas Clausen was born on +1801-01-16T00:00:00Z[3].

Education

Thomas Clausen studied under Heinrich Christian Schumacher[32].

Career and Affiliations

Recorded occupations include mathematician[6] and astronomer[7]. Fields of work include mathematics[13], an academic discipline[33] and astronomy[14], a branch of science[34]. Employers include Imperial University of Dorpat[15], an imperial universities of the Russian Empire[35], in Russian Empire[36], founded in 1803[37], headquartered in Tartu[38]; Altona Observatory[16], an astronomical observatory[39], in Germany[40]; and Utzschneider Optical Institute[17], an enterprise[41], in Germany[42], headquartered in Benediktbeuern[43]. Thomas Clausen supervised Ludwig Schwarz as a doctoral student[27].

Works and Contributions

Notable works include Bestimmung der Bahn des Cometen von 1770[18]; Clausen's formula[19], a mathematical concept[44]; Von Staudt–Clausen theorem[20], a theorem[45]; and Clausen function[21]. Things named for Thomas Clausen include Clausen's formula[46], a mathematical concept[47].

Recognition

Thomas Clausen received the honorary doctor of the University of Königsberg[22].

Death and Burial

Recorded date of death include +1885-05-24T00:00:00Z[5] and +1885-05-23T00:00:00Z[10]. Thomas Clausen died in Tartu[4]. He is buried at Raadi cemetery[11].

Why It Matters

Thomas Clausen ranks in the top 0.73% of human entities by monthly Wikipedia readership (8 views/month, #7,293 of 1,000,298).[8] He has Wikipedia articles in 13 language editions, a strong signal of global cultural recognition.[48] He is known by 4 alternative names across languages and contexts.[49]

He is credited with the discovery of Clausen function[50]. Entities named for him include Clausen's formula[46], a mathematical concept[47].

His notable doctoral advisees include Ludwig Schwarz[51], an astronomer[52], 1822–1894[53], of Russian Empire[54], awarded the Constantin Medal[55], specialised in astronomy[56].

FAQs

Where was Thomas Clausen born?

Thomas Clausen was born in Sønderborg[2].

Where did Thomas Clausen die?

Thomas Clausen passed away in Tartu[4].

What did Thomas Clausen do for work?

Thomas Clausen worked as mathematician[6] and astronomer[7].

What awards did Thomas Clausen receive?

Honors received include honorary doctor of the University of Königsberg[22].

What did Thomas Clausen discover?

Thomas Clausen is credited as discoverer of Clausen function[50].

References

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

Direct Wikidata claims

  1. [24] . wikidata.org.
  2. [2] . wikidata.org.
  3. [9] . MacTutor History of Mathematics archive. wikidata.org.
  4. [4] . MacTutor History of Mathematics archive. wikidata.org.
  5. [25] . Integrated Authority File. Retrieved . wikidata.org.
  6. [12] . wikidata.org.
  7. [26] . wikidata.org.
  8. [13] . wikidata.org.
  9. [14] . wikidata.org.
  10. [6] . wikidata.org.
  11. [7] . wikidata.org.
  12. [15] . MacTutor History of Mathematics archive. wikidata.org.
  13. [16] . MacTutor History of Mathematics archive. wikidata.org.
  14. [17] . MacTutor History of Mathematics archive. wikidata.org.
  15. [11] . Find a Grave. gis.tartulv.ee. Provenance: wikidata.org.
  16. [22] . wikidata.org.
  17. [27] . wikidata.org.
  18. [23] . wikidata.org.
  19. [3] . MacTutor History of Mathematics archive. Retrieved . wikidata.org.
  20. [5] . dml.cz. dml.cz. Provenance: wikidata.org.
  21. [10] . MacTutor History of Mathematics archive. Retrieved . wikidata.org.
  22. [18] . wikidata.org.
  23. [19] . wikidata.org.
  24. [20] . wikidata.org.
  25. [21] . wikidata.org.
  26. [32] . MacTutor History of Mathematics archive. wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [50] . wikidata.org. → on this site
  2. [51] . wikidata.org. → on this site
  3. [46] . 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. [33] . Wikidata. wikidata.org. → on this site
  6. [34] . Wikidata. wikidata.org. → on this site
  7. [35] . Wikidata. wikidata.org. → on this site
  8. [36] . Wikidata. wikidata.org. → on this site
  9. [37] . Wikidata. wikidata.org. → on this site
  10. [38] . Wikidata. wikidata.org. → on this site
  11. [39] . Wikidata. wikidata.org. → on this site
  12. [40] . Wikidata. wikidata.org. → on this site
  13. [41] . Wikidata. wikidata.org. → on this site
  14. [42] . Wikidata. wikidata.org. → on this site
  15. [43] . Wikidata. wikidata.org. → on this site
  16. [44] . Wikidata. wikidata.org. → on this site
  17. [45] . Wikidata. wikidata.org. → on this site
  18. [52] . Wikidata. wikidata.org. → on this site
  19. [53] . Wikidata. wikidata.org. → on this site
  20. [54] . Wikidata. wikidata.org. → on this site
  21. [55] . Wikidata. wikidata.org. → on this site
  22. [56] . Wikidata. wikidata.org. → on this site
  23. [47] . Wikidata. wikidata.org. → on this site

Class ancestry

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

Aggregate / graph-position facts

  1. [8] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [48] . Wikidata sitelinks. wikidata.org.
  3. [49] . Wikidata aliases. wikidata.org.

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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). Thomas Clausen. Retrieved April 10, 2026, from https://4ort.xyz/entity/thomas-clausen
MLA “Thomas Clausen.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/thomas-clausen.
BibTeX @misc{4ortxyz_thomas-clausen_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Thomas Clausen}}, year = {2026}, url = {https://4ort.xyz/entity/thomas-clausen}, note = {Accessed: 2026-04-10}}
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