# Joel Spencer

> American mathematician and academic

**Wikidata**: [Q1691718](https://www.wikidata.org/wiki/Q1691718)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Joel_Spencer)  
**Source**: https://4ort.xyz/entity/joel-spencer

## Summary
Joel Spencer is an American mathematician and academic best known for his work in discrete mathematics and theoretical computer science, especially in combinatorics and graph theory. He is an emeritus professor at New York University and a recipient of major honors including fellowship of the American Mathematical Society, fellowship of the Society for Industrial and Applied Mathematics, and the 2021 Steele Prize for Mathematical Exposition.

## Biography
- Born: 1946-04-20, Brooklyn
- Nationality: United States
- Education: Harvard University
- Known for: Contributions to discrete mathematics and theory of computing, particularly random graphs and networks, Ramsey theory, logic, and randomized algorithms
- Employer(s): New York University (emeritus)
- Field(s): Combinatorics; Graph theory

## Contributions
Joel Spencer has made sustained contributions to discrete mathematics and theoretical computer science, with emphasis on combinatorics and graph theory. His work is recognized for advancing understanding of random graphs and networks, Ramsey theory, logic, and randomized algorithms. He has supervised numerous doctoral students who went on to careers in mathematics and computer science, including Prasad V. Tetali, S. Muthu Muthukrishnan, Juliana Freire, Roberto Imbuzeiro Oliveira, and others. Spencer has an Erdős number of 1 (recorded in 1973). His scholarship and exposition have been acknowledged by major honors: he was named a Fellow of the American Mathematical Society (announced for the 2013 class), elected a Fellow of the Society for Industrial and Applied Mathematics in 2017 with citation for contributions to discrete mathematics and theory of computing, and awarded the AMS Steele Prize for Mathematical Exposition in 2021. He holds multiple standard scholarly identifiers (VIAF 18403230; ISNI 000000011400975X; MR Author ID 165430) and is listed in major bibliographic and authority files.

## FAQs
### Q: Who is Joel Spencer?
A: Joel Spencer is an American mathematician and academic, an emeritus professor at New York University, known for work in combinatorics and graph theory.

### Q: What is he best known for?
A: He is best known for contributions to discrete mathematics and theoretical computer science, particularly work on random graphs and networks, Ramsey theory, logic, and randomized algorithms.

### Q: Where did he study and who advised him?
A: He was educated at Harvard University and his doctoral advisor was Andrew Gleason.

### Q: Has he received major honors?
A: Yes. He is a Fellow of the American Mathematical Society (class of 2013), a Fellow of the Society for Industrial and Applied Mathematics (elected 2017), and a recipient of the 2021 Steele Prize for Mathematical Exposition.

### Q: Has he mentored notable students?
A: Yes. His doctoral students include Prasad V. Tetali, S. Muthu Muthukrishnan, Juliana Freire, Roberto Imbuzeiro Oliveira, and others.

## Why They Matter
Joel Spencer’s work shaped modern understanding of randomness in combinatorial structures and the use of probabilistic methods in theoretical computer science. His contributions clarified how random processes behave in graphs and networks and advanced methods used in Ramsey theory and randomized algorithms. These advances provided tools and viewpoints that influenced both pure mathematical research and algorithmic thinking in computer science. His mentorship produced a generation of researchers who continued work at the intersection of mathematics and computation, such as Prasad V. Tetali and others. Recognition by major professional organizations — fellowship in the AMS and SIAM, and the Steele Prize for exposition — reflects both technical depth and clarity of communication. Without Spencer’s contributions, the probabilistic method and related approaches in combinatorics and computing would have been less developed at the points where they now underpin a large body of subsequent work and education.

## Notable For
- Emeritus professor at New York University and long-time academic in combinatorics and graph theory.
- Fellow of the American Mathematical Society (announced for the 2013 class).
- Fellow of the Society for Industrial and Applied Mathematics (elected 2017) with citation for contributions to discrete mathematics and theory of computing.
- Recipient of the AMS Steele Prize for Mathematical Exposition (2021).
- Erdős number 1 (recorded in 1973).

## Body
### Personal and education
- Born on 1946-04-20 in Brooklyn.
- Educated at Harvard University.
- Doctoral advisor: Andrew Gleason.

### Academic positions
- Employed by New York University (listed as emeritus).
- Identified as a university teacher and academic.

### Research areas
- Primary fields: combinatorics and graph theory.
- Work described in honors and fellowship citations: random graphs and networks, Ramsey theory, logic, randomized algorithms.

### Mentorship and students
- Doctoral students include:
  - Prasad V. Tetali
  - S. Muthu Muthukrishnan
  - Juliana Freire
  - Roberto Imbuzeiro Oliveira
  - Lih-Hsing Hsu
  - Peter Dolan
  - Jacek Ossowski
  - Will Perkins
- Contribution to training the next generation of mathematicians and computer scientists.

### Honors, awards, and memberships
- Fellow of the American Mathematical Society (class of 2013).
- Fellow of the Society for Industrial and Applied Mathematics (2017).
- Steele Prize for Mathematical Exposition (2021).
- Membership/affiliation indicators: multiple authority file entries and bibliographic identifiers (VIAF, ISNI, Library of Congress, MR Author ID, dblp author ID).

### Identifiers and resources
- VIAF: 18403230
- ISNI: 000000011400975X
- MR Author ID: 165430
- dblp author ID: s/JoelHSpencer
- Mathematics Genealogy Project ID: 12998
- Image: https://commons.wikimedia.org/wiki/Special:FilePath/Joel_Spencer_2019.jpg

## Schema Markup
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  "@type": "Person",
  "name": "Joel Spencer",
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  },
  "nationality": {
    "@type": "Country",
    "name": "United States"
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  "birthDate": "1946-04-20",
  "birthPlace": "Brooklyn, United States",
  "alumniOf": [
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  "knowsAbout": [
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  "sameAs": [
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  "description": "American mathematician and academic known for contributions to combinatorics, graph theory, random graphs, Ramsey theory, and randomized algorithms; emeritus professor at New York University."
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## References

1. Integrated Authority File
2. BnF authorities
3. Library of Congress Authorities
4. [Source](https://math.nyu.edu/people/profiles/SPENCER_Joel.html)
5. [Source](https://www.siam.org/prizes-recognition/fellows-program/all-siam-fellows?page=3)
6. [Source](http://www.ams.org/fellows_by_year.cgi?year=2013)
7. [Source](http://www.ams.org/news?news_id=1680)
8. [Source](https://www.ams.org/prizes-awards/pabrowse.cgi?parent_id=26)
9. Mathematics Genealogy Project
10. International Standard Name Identifier
11. Library of Congress Name Authority File
12. Virtual International Authority File
13. CiNii Research
14. [Source](https://www.siam.org/prizes-recognition/fellows-program/all-siam-fellows)
15. [BnF authorities](http://data.bnf.fr/ark:/12148/cb12364961v)
16. Euclidean Ramsey Theorems. I