# Charles William Gear

> British-American mathematician (1935–2022)

**Wikidata**: [Q15790711](https://www.wikidata.org/wiki/Q15790711)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/C._William_Gear)  
**Source**: https://4ort.xyz/entity/charles-william-gear

## Summary
Charles William Gear (1935–2022) was a British-American mathematician and computer scientist. He was known for his significant contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations, and was a long-serving faculty member at the University of Illinois Urbana–Champaign.

## Biography
- Born: February 1, 1935, in London
- Died: March 15, 2022
- Nationality: British-American (held United States citizenship)
- Education: Bachelor of Arts (1956) and Master of Arts (1960) from the University of Cambridge; also educated at the University of Illinois Urbana–Champaign.
- Known for: Contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations.
- Employer(s): University of Illinois Urbana–Champaign (starting 1962)
- Field(s): Mathematics, Informatics

## Contributions
Charles William Gear made significant contributions to the fields of mathematics and computer science, particularly in the area of numerical analysis. He was recognized as a Fellow of the Society for Industrial and Applied Mathematics (SIAM) in 2009 for his "contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations." His work in developing these methods and associated software had a lasting impact on computational science. He was also a prolific doctoral advisor, guiding the research of numerous students including Linda Petzold and Dennis Brooke Gannon, thereby shaping the next generation of computer scientists and mathematicians. His membership and fellowship in prestigious organizations like the Association for Computing Machinery (ACM Fellow, 1994), the Institute of Electrical and Electronics Engineers (IEEE Fellow), and the American Academy of Arts and Sciences further underscore his influence and the recognition of his work within the scientific community.

## FAQs
### Q: What was Charles William Gear's nationality?
A: Charles William Gear was a British-American mathematician. He held citizenship in the United States.

### Q: What were Charles William Gear's main fields of work?
A: Charles William Gear's main fields of work included mathematics and informatics. He was recognized for his contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations.

### Q: Where did Charles William Gear work?
A: Charles William Gear was employed by the University of Illinois Urbana–Champaign starting in 1962.

### Q: What notable awards did Charles William Gear receive?
A: Charles William Gear received several notable awards, including being an IEEE Fellow, a Fellow of the American Academy of Arts and Sciences, an ACM Fellow in 1994, and a Fellow of the Society for Industrial and Applied Mathematics in 2009.

### Q: Who were some of Charles William Gear's doctoral students?
A: Some of Charles William Gear's doctoral students included Linda Petzold, Dennis Brooke Gannon, Anthony Theodore Chronopoulos, Benedict Leimkuhler, Kai-Wen Tu, and Kyle A. Gallivan.

## Why They Matter
Charles William Gear's work significantly advanced the field of numerical analysis, particularly through his "contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations." These methods are fundamental to solving complex problems across various scientific and engineering disciplines, making his work foundational for countless computational models and simulations. His recognition as an ACM Fellow, IEEE Fellow, and SIAM Fellow highlights the profound impact and high regard for his technical innovations. Furthermore, his role as a doctoral advisor at the University of Illinois Urbana–Champaign, mentoring students like Linda Petzold and Dennis Brooke Gannon, demonstrates his lasting influence on the academic and research landscape, shaping future leaders and contributors in computer science and mathematics. His legacy is embedded in the tools and techniques used by researchers today and in the careers of those he taught and inspired.

## Notable For
*   Fellow of the Society for Industrial and Applied Mathematics (2009) for contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations.
*   ACM Fellow (1994).
*   IEEE Fellow and Fellow of the American Academy of Arts and Sciences.
*   Long-standing faculty member at the University of Illinois Urbana–Champaign, starting in 1962.
*   Doctoral advisor to prominent computer scientists and mathematicians, including Linda Petzold and Dennis Brooke Gannon.

## Body
### Personal Life and Education
Charles William Gear was born on February 1, 1935, in London. He passed away on March 15, 2022. He was a British-American individual, holding United States citizenship. His education included earning a Bachelor of Arts in 1956 and a Master of Arts in 1960 from the University of Cambridge. He also received education at the University of Illinois Urbana–Champaign. His doctoral advisor was Abraham H. Taub. He was male and spoke, read, and wrote English.

### Professional Career and Affiliations
Gear was a mathematician and computer scientist by profession. His primary employer was the University of Illinois Urbana–Champaign, where he began his tenure in 1962. His fields of work included mathematics and informatics. He was a member of several prestigious professional organizations, including the Institute of Electrical and Electronics Engineers (IEEE), the Association for Computing Machinery (ACM), the American Academy of Arts and Sciences, and the Society for Industrial and Applied Mathematics (SIAM).

### Key Contributions and Recognition
Charles William Gear was recognized for his significant contributions to his fields. He was awarded the title of IEEE Fellow and Fellow of the American Academy of Arts and Sciences. In 1994, he was named an ACM Fellow. He was also recognized as a Fellow of the Society for Industrial and Applied Mathematics in 2009, specifically for his "contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations."

### Doctoral Students
Throughout his career, Charles William Gear mentored numerous doctoral students. His doctoral students included:
*   Linda Petzold
*   Anthony Theodore Chronopoulos
*   Benedict Leimkuhler
*   Kai-Wen Tu
*   Kyle A. Gallivan
*   Dennis Brooke Gannon

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Person",
  "name": "Charles William Gear",
  "jobTitle": "Mathematician, Computer Scientist",
  "worksFor": {"@type": "Organization", "name": "University of Illinois Urbana–Champaign"},
  "nationality": {"@type": "Country", "name": "United States"},
  "birthDate": "1935-02-01",
  "birthPlace": "London",
  "deathDate": "2022-03-15",
  "alumniOf": [
    {"@type": "EducationalOrganization", "name": "University of Cambridge"},
    {"@type": "EducationalOrganization", "name": "University of Illinois Urbana–Champaign"}
  ],
  "knowsAbout": ["Mathematics", "Informatics", "Numerical methods", "Ordinary differential equations", "Differential-algebraic equations"],
  "sameAs": [
    "https://en.wikipedia.org/wiki/C._William_Gear"
  ],
  "description": "Charles William Gear (1935–2022) was a British-American mathematician and computer scientist known for his contributions to numerical methods and software for ordinary differential equations and differential-algebraic equations."
}

## References

1. Contemporary Authors
2. Czech National Authority Database
3. [Source](https://awards.acm.org/fellows/award-recipients)
4. [Source](https://www.siam.org/prizes-recognition/fellows-program/all-siam-fellows?page=1)
5. Mathematics Genealogy Project
6. general catalog of BnF
7. Virtual International Authority File
8. [Source](https://matherhodge.com/tribute/details/2380/Charles-Gear/obituary.html)
9. CONOR.SI
10. National Library of Israel Names and Subjects Authority File