Jun-Ichi Igusa

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Jun-Ichi Igusa
Born (1924-01-30)30 January 1924
Died 25 November 2013(2013-11-25) (aged 89)
Nationality Japanese
Alma mater Kyoto University
Known for Igusa zeta-function
Scientific career
Fields Mathematics
Institutions Johns Hopkins University
Doctoral students Tetsuji Shioda

Jun-Ichi Igusa (井草 準一, Igusa Jun’ichi, 30 January 1924 − 25 November 2013)[1] was a Japanese mathematician who for over three decades was on the faculty at Johns Hopkins University. He is known for his contributions to algebraic geometry and number theory. The Igusa zeta-function, the Igusa quartic, Igusa subgroups, Igusa curves, and Igusa varieties are named after him.[2]

He was an invited speaker for the 1962 ICM in Stockholm.[3] He was awarded Japan's Order of the Sacred Treasure. In 2012 he became a fellow of the American Mathematical Society.[4]

He has three sons, Kiyoshi, Takeru and Mitsuru.[5] Takeru Igusa is a professor of civil engineering at Johns Hopkins University. Kiyoshi Igusa is a professor of mathematics at Brandeis University.



  1. ^ Lo, Samuel E. (1971). Asian Who? in America. East-West Who. p. 109. 
  2. ^ "Jun-ichi Igusa, Noted Mathematician and Researcher, Died at 89 — Johns Hopkins University". Krieger.jhu.edu. 2013-11-27. Archived from the original on 2013-12-03. Retrieved 2013-11-29. 
  3. ^ http://www.mathunion.org/db/ICM/Speakers/SortedByLastname.php
  4. ^ List of Fellows of the American Mathematical Society, retrieved 2013-01-26.
  5. ^ "Archived copy". Archived from the original on 2013-12-03. Retrieved 2013-11-29. 

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