Stephen Cole Kleene
American mathematician (1909–1994) / From Wikipedia, the free encyclopedia
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Stephen Cole Kleene (/ˈkleɪni/ KLAY-nee;[lower-alpha 1] January 5, 1909 – January 25, 1994) was an American mathematician. One of the students of Alonzo Church, Kleene, along with Rózsa Péter, Alan Turing, Emil Post, and others, is best known as a founder of the branch of mathematical logic known as recursion theory, which subsequently helped to provide the foundations of theoretical computer science. Kleene's work grounds the study of computable functions. A number of mathematical concepts are named after him: Kleene hierarchy, Kleene algebra, the Kleene star (Kleene closure), Kleene's recursion theorem and the Kleene fixed-point theorem. He also invented regular expressions in 1951 to describe McCulloch-Pitts neural networks, and made significant contributions to the foundations of mathematical intuitionism.
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Stephen Kleene | |
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Born | (1909-01-05)January 5, 1909 Hartford, Connecticut, U.S. |
Died | January 25, 1994(1994-01-25) (aged 85) Madison, Wisconsin, U.S. |
Nationality | American |
Alma mater | Amherst College Princeton University |
Known for | |
Awards | Leroy P. Steele Prize (1983) National Medal of Science (1990) |
Scientific career | |
Fields | Mathematics |
Institutions | University of Wisconsin–Madison |
Doctoral advisor | Alonzo Church |
Doctoral students | Robert Constable Joan Moschovakis Yiannis Moschovakis Nels David Nelson Dick de Jongh |