Bill Gosper
| Ralph William Gosper, Jr | |
|---|---|
| 150px | |
| Born | 1943 (age 80–81) |
| Nationality | American |
| Alma mater | Massachusetts Institute of Technology |
| Occupation | Programmer |
Ralph William Gosper, Jr. (born 1943), known as Bill Gosper, is an American mathematician and programmer from Pennsauken Township, New Jersey.[1] Along with Richard Greenblatt, he may be considered to have founded the hacker community, and he holds a place of pride in the Lisp community[citation needed].
Contents
Becoming a hacker
In high school, Gosper was interested in model rockets until one of his friends was injured in a rocketry accident and contracted a fatal brain infection.[2] Gosper enrolled in MIT in 1961, and he received his bachelor's degree in mathematics from MIT in 1965 despite becoming disaffected from the mathematics department because of their anti-computer attitude.[2]
In his second year at MIT, Gosper took a programming course from John McCarthy and became affiliated with the MIT AI Lab.
His contributions to computational mathematics include HAKMEM and the MIT Maclisp system. He made major contributions to Macsyma, Project MAC's computer algebra system. Gosper later worked with Symbolics and Macsyma, Inc. on commercial versions of Macsyma.
In 1974, he moved to Stanford University, where he lectured and worked with Donald Knuth.[2]
Since that time, he has worked at or consulted for Xerox PARC, Symbolics, Wolfram Research, the Lawrence Livermore Laboratory, and Macsyma Inc.
Key contributions
Game of life
He became intensely interested in the Game of Life shortly after John Horton Conway had proposed it. Conway conjectured on the existence of infinitely growing patterns, and offered a reward for an example. Gosper was the first to find such a pattern (specifically, the glider gun), and won the prize. Gosper was also the originator of the hashlife algorithm that can speed up the computation of Life patterns by many orders of magnitude.
Packing problems
Gosper has created numerous packing problem puzzles, such as "Twubblesome Twelve".[3]
Symbolic computation
Perhaps his most profound contribution is that he was the first person to realize the possibilities of symbolic computation on a computer as a mathematics research tool, whereas computer methods were previously limited to purely numerical methods. In particular, this research resulted in his work on continued fraction representations of real numbers, and far more famously, developing Gosper's algorithm for finding closed form hypergeometric identities.
Gosper briefly held the world record for computing the most digits of pi with 17 million digits.[4] See chronology of computation of π.
See also
References
- ↑ Bill Gosper, Vintage Computer Festival. Accessed January 3, 2007.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found..
- ↑ Lua error in package.lua at line 80: module 'strict' not found..
- ↑ Lua error in package.lua at line 80: module 'strict' not found. English translation by Catriona and David Lischka. Record was in 1985.
External links
- Bill Gosper's webpage which contains a Biography
- Bill Gosper's Graphics
- Twubblesome Twelve Puzzle - version for the free Mathematica Player
- Pages with broken file links
- Pages using infobox person with unknown parameters
- Articles with hCards
- Articles with unsourced statements from June 2015
- 1943 births
- Living people
- 20th-century American mathematicians
- 21st-century American mathematicians
- Number theorists
- Massachusetts Institute of Technology alumni
- Cellular automatists
- People from Pennsauken Township, New Jersey
