Jun-Ichi Igusa

Jun-Ichi Igusa (井草 準一, Igusa Jun’ichi, 30 January 1924 – 24 November 2013) 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.[1]

Jun-Ichi Igusa
Born(1924-01-30)30 January 1924
Kiyosato village, Gunma Prefecture, Japan
Died24 November 2013(2013-11-24) (aged 89)
Towson, Maryland
NationalityJapanese
Alma materKyoto University
Known forIgusa zeta-function
Scientific career
FieldsMathematics
InstitutionsUniversity of Tsukuba
Harvard University
Johns Hopkins University
Doctoral students

He was an invited speaker for the 1962 International Congress of Mathematicians in Stockholm.[2] He was awarded Japan's Order of the Sacred Treasure.[3] In 2012 he became a fellow of the American Mathematical Society.[4]

Life and career

Igusa was born in Kiyosato village, Gunma Prefecture, Japan, on 30 January 1924.[5] He graduated from the University of Tokyo in 1945 and received his Ph.D. from Kyoto University in 1953, after which he became professor of mathematics at the University of Tsukuba. After a brief period spent at Harvard University, he took up a permanent position at Johns Hopkins University, in Baltimore. Igusa taught at Johns Hopkins from 1955 to 1993.[6] He joined the staff of the American Journal of Mathematics as an associate editor in 1964, and served as chief editor between 1978 and 1993.[7] Igusa died, aged 89, of a stroke at Holly Hill Nursing Home in Towson, Maryland, on 24 November 2013.[6]

He had three sons, Kiyoshi, Takeru and Mitsuru.[1] Takeru Igusa is a professor of civil engineering at Johns Hopkins University. Kiyoshi Igusa is a professor of mathematics at Brandeis University.

Publications
  • Igusa, Jun-ichi (1972), Theta functions, Die Grundlehren der mathematischen Wissenschaften, 194, Berlin, New York: Springer-Verlag, ISBN 978-3-540-05699-7, MR 0325625
  • Igusa, Jun-ichi (1978), Forms of higher degree (PDF), Tata Institute of Fundamental Research Lectures on Mathematics and Physics, 59, Bombay: Tata Institute of Fundamental Research, ISBN 978-0-387-08944-7, MR 0546292
  • Igusa, Jun-ichi (2000), An introduction to the theory of local zeta functions, AMS/IP Studies in Advanced Mathematics, 14, Providence, R.I.: American Mathematical Society, ISBN 978-0-8218-2015-5, MR 1743467

References
  1. "Jun-ichi Igusa, noted mathematician and JHU researcher, dies at 89". Johns Hopkins University. Archived from the original on 3 December 2013. Retrieved 29 November 2013.
  2. http://www.mathunion.org/db/ICM/Speakers/SortedByLastname.php
  3. "Mathematician Receives Japan's Order of the Sacred Treasure". Johns Hopkins University. 5 January 2005. Archived from the original on 4 April 2005. Retrieved 17 October 2019.
  4. List of Fellows of the American Mathematical Society, retrieved 2013-01-26.
  5. Lo, Samuel E. (1971). Asian Who? in America. East-West Who. p. 109.
  6. Kelly, Jacques (6 December 2013). "Jun-ichi Igusa". Baltimore Sun. Retrieved 17 October 2019.
  7. "In Memoriam: Jun-Ichi Igusa 1924–2013". American Journal of Mathematics. 136 (1): iii. February 2014. doi:10.1353/ajm.2014.0000.


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