Nobuo Yoneda

Nobuo Yoneda (米田 信夫, Yoneda Nobuo, March 28, 1930 – April 22, 1996) was a Japanese mathematician and computer scientist.[1][2]

He obtained his Ph.D. degree from the University of Tokyo in 1952, under the direction of Shokichi Iyanaga. That same year he was appointed Assistant Professor in the Department of Mathematics of the University of Tokyo. In 1962 he was appointed Associate Professor in the Faculty of Science at Gakushuin University, and was promoted in 1966 to the rank of Professor. He became a professor of Theoretical Foundation of Information Science in 1972. After retiring from the University of Tokyo in 1990, he moved to Tokyo Denki University.

The Yoneda lemma in category theory and the Yoneda product in homological algebra are named after him.[3] In computer science, he is known for his work on ALGOL dialects.[4]


  1. Wada, Eiiti; Yonezawa, Akinori (November 1996), "Professor Nobuo Yoneda (28 March 1930–22 April 1996)", Science of Computer Programming, 27 (3): 215–216, doi:10.1016/0167-6423(96)88115-9.
  2. Kinoshita, Yoshiki (1998), "Nobuo Yoneda", Mathematica Japonicae, 47: 155.
  3. Mac Lane, Saunders (1998), "The Yoneda Lemma", Mathematica Japonicae, 47: 156.
  4. Koster, Cornelis H. A. (1996), "The Making of Algol 68", in Bjørner, Dines; Broy, Manfred; Pottosin, Igor V. (eds.), Perspectives of System Informatics: Second International Andrei Ershov Memorial Conference, Akademgorodok, Novosibirsk, Russia, June 25 - 28, 1996, Proceedings, Lecture Notes in Computer Science, 1181, pp. 55–67, doi:10.1007/3-540-62064-8_6. See in particular p. 61.
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