Walter John Savitch (born February 21, 1943) is best known for discovering the complexity class NL (nondeterministic logarithmic space), and for Savitch's theorem, which defines a relationship between the NSPACE and DSPACE complexity classes. His work in establishing complexity classes has helped to create the background against which non-deterministic and probabilistic reasoning can be performed.
He has also done extensive work in the field of natural language processing and mathematical linguistics. He has been focused on computational complexity as it applies to genetics and biology for over 10 years.
Savitch received his PhD in mathematics from UC Berkeley in 1969 under the supervision of Stephen Cook. Since then he has been a professor at UCSD where he is currently a professor emeritus in the computer science department.
- The UCSD home page of Walter Savitch
- Richard J. Lipton, Savitch’s Theorem. Gives a historical account on how Savitch's Theorem was discovered.
- Walter Savitch at the Mathematics Genealogy Project
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