|Ralph William Gosper, Jr|
|Born||1943 (age 70–71)|
|Alma mater||Massachusetts Institute of Technology|
Ralph William Gosper, Jr. (born 1943), known as Bill Gosper, is an American mathematician and programmer from Pennsauken Township, New Jersey. 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.
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. 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.
In his second year at MIT, Gosper took a programming course from John McCarthy and became affiliated with the MIT AI Lab. In 1974, he moved to Stanford University, where he worked with Donald Knuth. Eventually he also worked for Xerox PARC, Macsyma and others.
His contributions to computational mathematics include HAKMEM and the MIT Maclisp system. He made major contributions to the Macsyma, Project MAC's computer algebra system. Gosper later worked with Symbolics and Macsyma, Inc. on commercial versions of Macsyma.
Working with Knuth
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.
Gosper has created numerous packing problem puzzles, such as "Twubblesome Twelve".
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.
- Bill Gosper, Vintage Computer Festival. Accessed January 3, 2007.
- Albers, Donald J.; Alexanderson, Gerald L.; Reid, Constance, eds. (1990), "Bill Gosper", More Mathematical People, Harcourt Brace Jovanovich, pp. 100–117.
- Arndt, Jörg; Haenel, Christoph (2006), Pi Unleashed, Springer-Verlag, pp. 104, 206, ISBN 978-3-540-66572-4 English translation by Catriona and David Lischka. Record was in 1985.
- Bill Gosper's webpage which contains a Biography
- Bill Gosper's Graphics
- Twubblesome Twelve Puzzle - version for the free Mathematica Player