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Joseph Yehuda Halpern (born 1953) is a professor of computer science at Cornell University. Most of his research is on reasoning about knowledge and uncertainty.

Joseph Yehuda Halpern
Joe Halpern IMG 1588.jpg
Joseph Halpern at the EPFL in June 2008
Born 1953
Awards Gödel Prize (1997)
Allen Newell Award (2008)
Dijkstra Prize (2009)
Scientific career
Fields Computer Science
Institutions Cornell University
Doctoral students Nir Friedman, Daphne Koller, Yoram Moses

Halpern graduated in 1975 from University of Toronto with a B.S. in mathematics. He went on to earn a Ph.D. in mathematics from Harvard University in 1981 under the supervision of Albert R. Meyer and Gerald Sacks. He has written two books, Reasoning about Uncertainty and Reasoning About Knowledge and is a winner of the 1997 Gödel Prize in theoretical computer science and the 2009 Dijkstra Prize in distributed computing. From 1997 to 2003 he was editor-in-chief of the Journal of the ACM.[1] In 2002 he was inducted as a Fellow of the Association for Computing Machinery and in 2012 he was selected as an IEEE Fellow.[2] In 2011 he was awarded a Senior Fellowship of the Zukunftskolleg at the University of Konstanz.[3]

Halpern is also the administrator for the Computing Research Repository, the computer science branch of, and the moderator for the "general literature" and "other" subsections of the repository.[4]

His students include Nir Friedman, Daphne Koller, and Yoram Moses.[citation needed]


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