Emil Leon Post

Polish-born American logician (1897–1954)
Person human Q351366
Emil Leon Post
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Emil Leon Post

Summary

Emil Leon Post is a human[1]. He was born in Augustów[2]. He was born on February 11, 1897[3]. He died in New York City[4]. He died on April 21, 1954[5]. He worked as a mathematician[6], philosopher[7], logician[8], and university teacher[9]. He has Wikipedia articles in 19 language editions, a strong signal of global cultural recognition.[10]

Key Facts

  • Born in Augustów[2], Emil Leon Post…
  • Emil Leon Post passed away in New York City[4].
  • Emil Leon Post was born on February 11, 1897[3].
  • Emil Leon Post died on April 21, 1954[5].
  • Emil Leon Post is buried at Mount Hebron Cemetery[11].
  • Emil Leon Post held citizenship in United States[12].
  • Polish was Emil Leon Post's native language[13].
  • Emil Leon Post worked as a mathematician[6].
  • Emil Leon Post worked as a philosopher[7].
  • Emil Leon Post's professions included logician[8].
  • Emil Leon Post's professions included university teacher[9].
  • Emil Leon Post's field of work was mathematics[14].
  • Among Emil Leon Post's employers was City College of New York[15].
  • Emil Leon Post was employed by Princeton University[16].
  • Among Emil Leon Post's employers was Columbia University[17].
  • Among Emil Leon Post's employers was Cornell University[18].
  • Among Emil Leon Post's employers was George Washington Educational Campus[19].
  • Emil Leon Post's education included a stint at Columbia University[20].
  • Emil Leon Post was educated at Townsend Harris High School[21].
  • Emil Leon Post was educated at City College of New York[22].
  • Emil Leon Post's doctoral advisor was Cassius Jackson Keyser[23].
  • A notable work attributed to Emil Leon Post is Post correspondence problem[24].
  • A notable work attributed to Emil Leon Post is Post's inversion formula[25].
  • A notable work attributed to Emil Leon Post is Post's lattice[26].
  • A notable work attributed to Emil Leon Post is Post's theorem[27].

Body

Origins and Family

Emil Leon Post was born in Augustów[2]. He was born on February 11, 1897[3]. Polish was his native language[13].

Education

Educated at Columbia University[20], a private university[28], in United States[29], founded in 1754[30], headquartered in Manhattan[31]; Townsend Harris High School[21], a high school[32], in United States[33], founded in 1904[34]; and City College of New York[22], a higher education institution[35], in United States[36], founded in 1847[37], headquartered in New York City[38]. Emil Leon Post's doctoral advisor was Cassius Jackson Keyser[23].

Career and Affiliations

Recorded occupations include mathematician[6], philosopher[7], logician[8], and university teacher[9]. Emil Leon Post's field of work was mathematics[14]. Employers include City College of New York[15], a higher education institution[39], in United States[40], founded in 1847[41], headquartered in New York City[42]; Princeton University[16], a private university[43], in United States[44], founded in 1746[45], headquartered in Princeton[46]; Columbia University[17], a private university[47], in United States[48], founded in 1754[49], headquartered in Manhattan[50]; Cornell University[18], a private university[51], in United States[52], founded in 1865[53], headquartered in Ithaca[54]; and George Washington Educational Campus[19], a high school[55], in United States[56], founded in 1919[57].

Works and Contributions

Notable works include Post correspondence problem[24], a decision problem[58]; Post's inversion formula[25], a mathematical concept[59]; Post's lattice[26], a theorem[60]; Post's theorem[27], a theorem[61]; and Post canonical system[62], a Semi-Thue system[63]. Things named for Emil Leon Post include Post correspondence problem[64], a decision problem[65].

Death and Burial

Emil Leon Post died on April 21, 1954[5]. He passed away in New York City[4]. He is buried at Mount Hebron Cemetery[11].

Why It Matters

Emil Leon Post has Wikipedia articles in 19 language editions, a strong signal of global cultural recognition.[10] He is known by 22 alternative names across languages and contexts.[66]

He is credited with the discovery of Post correspondence problem[67], a decision problem[68] and tag system[69], a deterministic finite automata[70]. Entities named for him include Post correspondence problem[64], a decision problem[65].

FAQs

Where was Emil Leon Post born?

Emil Leon Post was born in Augustów[2].

Where did Emil Leon Post die?

Emil Leon Post passed away in New York City[4].

What did Emil Leon Post do for work?

Emil Leon Post worked as mathematician[6], philosopher[7], logician[8], and university teacher[9].

Where did Emil Leon Post go to school?

Emil Leon Post was educated at Columbia University[20], Townsend Harris High School[21], and City College of New York[22].

What did Emil Leon Post discover?

Emil Leon Post is credited as discoverer of Post correspondence problem[67] and tag system[69].

References

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

Direct Wikidata claims

  1. [2] ↑ . www-gap.dcs.st-and.ac.uk. Retrieved . www-gap.dcs.st-and.ac.uk. Provenance: wikidata.org.
  2. [4] ↑ . www-gap.dcs.st-and.ac.uk. Retrieved . www-gap.dcs.st-and.ac.uk. Provenance: wikidata.org.
  3. [12] ↑ . wikidata.org.
  4. [20] ↑ . books.google.cat. books.google.cat. Provenance: wikidata.org.
  5. [21] ↑ . books.google.cat. books.google.cat. Provenance: wikidata.org.
  6. [22] ↑ . books.google.cat. books.google.cat. Provenance: wikidata.org.
  7. [14] ↑ . wikidata.org.
  8. [13] ↑ . wikidata.org.
  9. [6] ↑ . www-gap.dcs.st-and.ac.uk. Retrieved . www-gap.dcs.st-and.ac.uk. Provenance: wikidata.org.
  10. [7] ↑ . wikidata.org.
  11. [8] ↑ . www-gap.dcs.st-and.ac.uk. Retrieved . www-gap.dcs.st-and.ac.uk. Provenance: wikidata.org.
  12. [9] ↑ . wikidata.org.
  13. [15] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  14. [16] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  15. [17] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  16. [18] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  17. [19] ↑ . MacTutor History of Mathematics archive. books.google.cat. Provenance: wikidata.org.
  18. [11] ↑ . Find a Grave. mounthebroncemetery.com. Provenance: wikidata.org.
  19. [23] ↑ . Mathematics Genealogy Project. Retrieved . wikidata.org.
  20. [3] ↑ . MacTutor History of Mathematics archive. Retrieved . www-gap.dcs.st-and.ac.uk. Provenance: wikidata.org.
  21. [5] ↑ . MacTutor History of Mathematics archive. Retrieved . www-gap.dcs.st-and.ac.uk. Provenance: wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.
  26. [62] ↑ . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [67] ↑ . wikidata.org. → on this site
  2. [69] ↑ . wikidata.org. → on this site
  3. [64] ↑ . 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. [42] ↑ . Wikidata. wikidata.org. → on this site
  16. [43] ↑ . Wikidata. wikidata.org. → on this site
  17. [44] ↑ . Wikidata. wikidata.org. → on this site
  18. [45] ↑ . Wikidata. wikidata.org. → on this site
  19. [46] ↑ . Wikidata. wikidata.org. → on this site
  20. [47] ↑ . Wikidata. wikidata.org. → on this site
  21. [48] ↑ . Wikidata. wikidata.org. → on this site
  22. [49] ↑ . Wikidata. wikidata.org. → on this site
  23. [50] ↑ . Wikidata. wikidata.org. → on this site
  24. [51] ↑ . Wikidata. wikidata.org. → on this site
  25. [52] ↑ . Wikidata. wikidata.org. → on this site
  26. [53] ↑ . Wikidata. wikidata.org. → on this site
  27. [54] ↑ . Wikidata. wikidata.org. → on this site
  28. [55] ↑ . Wikidata. wikidata.org. → on this site
  29. [56] ↑ . Wikidata. wikidata.org. → on this site
  30. [57] ↑ . Wikidata. wikidata.org. → on this site
  31. [58] ↑ . Wikidata. wikidata.org. → on this site
  32. [59] ↑ . Wikidata. wikidata.org. → on this site
  33. [60] ↑ . Wikidata. wikidata.org. → on this site
  34. [61] ↑ . Wikidata. wikidata.org. → on this site
  35. [63] ↑ . Wikidata. wikidata.org. → on this site
  36. [68] ↑ . Wikidata. wikidata.org. → on this site
  37. [70] ↑ . Wikidata. wikidata.org. → on this site
  38. [65] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [10] ↑ . Wikidata sitelinks. wikidata.org.
  2. [66] ↑ . 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). Emil Leon Post. Retrieved October 4, 2026, from https://4ort.xyz/entity/emil-leon-post
MLA “Emil Leon Post.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Oct. 2026, https://4ort.xyz/entity/emil-leon-post.
BibTeX @misc{4ortxyz_emil-leon-post_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Emil Leon Post}}, year = {2026}, url = {https://4ort.xyz/entity/emil-leon-post}, note = {Accessed: 2026-10-04}}
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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. 14w ago · Printstream · 2026-06-26 view diff on Wikidata ↗
    P14536 → 422821
    "/* wbcreateclaim-create:1| */ [[Property:P14536]]: 422821, #quickstatements; #temporary_batch_1782462304762"
  2. 15w ago · Yirba · 2026-06-20 view diff on Wikidata ↗
    Employer → —
    Citizenship → —
    Instance of → human
    Place of burial → Mount Hebron Cemetery
    + 26 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/37444|batch #37444]]: Encyclopedia of China (Third Edition) ID (2026) ([[Property:P14541]]) 2"
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