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Dexter Campbell Kozen (born December 20, 1951) is an American theoretical computer scientist. He is Joseph Newton Pew, Jr. Professor in Engineering at Cornell University.


Kozen received his B.A. from Dartmouth College in 1974 and his PhD in computer science in 1977 from Cornell University, where he was advised by Juris Hartmanis.[1]

He is a Fellow of the Association for Computing Machinery,[2] a Guggenheim Fellow, and has received an Outstanding Innovation Award from IBM Corporation. He has also been named Faculty of the Year by the Association of Computer Science Undergraduates at Cornell.

Kozen was one of the first professors to receive the honor of a professorship at The Radboud Excellence Initiative at Radboud University Nijmegen in the Netherlands.[3]

He is known for his work at the intersection of logic and complexity. He is one of the fathers of dynamic logic[4] and developed the version of the modal μ-calculus most used today.[5] Moreover, he has written several textbooks on the theory of computation,[6] automata theory, dynamic logic, and algorithms.

Kozen was a guitarist, singer, and songwriter in the band "Harmful if Swallowed". He also holds the position of faculty advisor for Cornell's rugby football club[7] and plays for the Cortland Homer Thundering Herd rugby team.[citation needed]

Awards and honors


  1. ^ Dexter Kozen at the Mathematics Genealogy Project
  2. ^ "Dexter Kozen – Award Winner". Association for Computing Machinery. Retrieved 31 October 2013.
  3. ^ "Professor Dexter Kozen". Retrieved 2015-03-17.[dead link]
  4. ^ David Harel, Dexter Kozen, and Jerzy Tiuryn, "Dynamic Logic". MIT Press, 2000.
  5. ^ Dexter Kozen (1983). "Results on the Propositional μ-Calculus". Theoretical Computer Science 27 (3): 333–354.
  6. ^ Dexter Kozen (2006). Theory of Computation. Springer. ISBN 1-84628-297-7.
  7. ^ "Cornell Rugby Football Club > Cornell Men Big Red Men > Team Contacts". Archived from the original on April 19, 2010. Retrieved October 7, 2010.
  8. ^ a b c d e "Awards". Cornell Bowers CIS - Computer Science. Retrieved 2022-09-08.
  9. ^ "Dexter C. Kozen". John Simon Guggenheim Memorial Foundation. Retrieved 2022-09-08.
  10. ^ Kozen, Dexter; Tiuryn, Jerzy (1990). "Logics of programs". In van Leeuwen, Jan (ed.). Handbook of Theoretical Computer Science, volume B. Elsevier and MIT Press. pp. 789–840. ISBN 0444880747.
  11. ^ Harel, David; Kozen, Dexter; Tiuryn, Jerzy (2000). Dynamic Logic. MIT Press. p. 476. ISBN 9780262527668.
  12. ^ "AAAS Fellows" (PDF). AAAS. Retrieved 2022-09-08.
  13. ^ Kozen, Dexter (1991). "A completeness theorem for Kleene algebras and the algebra of regular events". Proc. 1991 Sixth Annual IEEE Symp. on Logic in Computer Science. Amsterdam, Netherlands: IEEE Computer Society. pp. 214–225. doi:10.1109/LICS.1991.151646. hdl:1813/6963.
  14. ^ "Weiss Presidential Fellow (for contributions to undergraduate education)". Cornell. Retrieved 2022-09-08.
  15. ^ "POPL 2020 Program". SIGPLAN. Retrieved 2022-09-08.
  16. ^ Smolka, Steffen; Foster, Nate; Hsu, Justin; Kappé, Tobias; Kozen, Dexter; Silva, Alexandra (January 2020). "Guarded Kleene algebra with tests: verification of uninterpreted programs in nearly linear time". Proc of the ACM on Programming Languages. Vol. 4. IEEE Computer Society. pp. 214–225. arXiv:1907.05920. doi:10.1145/3371129.
  17. ^ "Alonzo Church Award". EACSL. Retrieved 2022-09-08.
  18. ^ Kozen, Dexter (May 1977). "Kleene algebra with tests". ACM Transactions on Programming Languages and Systems. 19 (3): 427–443. doi:10.1145/256167.256195. S2CID 6658131.