Tadao Tannaka

Tadao Tannaka (淡中 忠郎, Tannaka Tadao, December 27, 1908 – October 25, 1986) was a Japanese mathematician who worked in algebraic number theory.

Tadao Tannaka
Born	December 27, 1908 Matsuyama, Ehime Prefecture, Japan
Died	October 25, 1986 (aged 77) Tokyo, Japan
Alma mater	Tohoku University
Known for	Tannaka–Krein duality Tannakian formalism
Awards	3rd Class Order of the Rising Sun (1980)
Scientific career
Fields	Mathematics
Institutions	Tohoku University Tohoku Gakuin University Institute for Advanced Study

Biography

Tannaka was born in Matsuyama, Ehime Prefecture on December 27, 1908.[1][2][3] After receiving a Bachelor of Science in mathematics from Tohoku Imperial University in 1932, he was appointed a lecturer in the university in 1934 and received a Doctor of Science degree from the university in 1941.[1][3] He was promoted to assistant professor in 1942 and full professor in 1945.[1][2][3] Tannaka was a member at the Institute for Advanced Study from September 1955 to April 1957.[1][3][4] Tannaka retired from Tohoku University in 1972, after which he served as a full professor at Tohoku Gakuin University until 1981.[1][3]

Tannaka was an editor of the Tohoku Mathematical Journal and a member of the board of directors of the Mathematical Society of Japan.[1] Tannaka was also in charge of the "Mathematics Chat" article series in the monthly Mathematics for Universities magazine from 1960 onwards.[5]

Tannaka died in Tokyo on October 25, 1986.[1][2][3]

Research

Tannaka is known for developing the theory of Tannaka–Krein duality, which generalizes Pontryagin duality to noncommutative compact groups and led to the development of Tannakian formalism.[1][2][6][7]

Awards

Tannaka was a recipient of the Order of the Rising Sun (3rd Class) in 1980.[3]

See also

• Tannaka–Artin problem

References

1. "Tadao Tannaka: 1908--1986". Tohoku Mathematical Journal. 39 (1). 1987.
2. 淡中忠郎 とは. Kodansha Encyclopedia of Japan (in Japanese). Kotobank. Retrieved December 20, 2020.
3. 淡中忠郎. 20世紀日本人名事典 (20th-century people in Japan: A biographical dictionary) (in Japanese). Kotobank. Retrieved December 20, 2020.
4. "Tadao Tannaka". Institute for Advanced Study. Retrieved December 20, 2020.
5. "東京出版創立30周年記念の集い" [Tokyo Publishing 30th Anniversary Gathering]. Mathematics for Universities (in Japanese). Hiroo, Shibuya Ward, Tokyo: Tokyo Publishing. 30 (7): 36. July 1986. Periodical 05949-7.
6. Joyal, André; Street, Ross (1991). "Introduction to Tannaka Duality and Quantum Groups in". Category Theory II, Proc. Como 1990 (PDF). Lecture Notes in Mathematics. 1488. p. 411–492.
7. Deligne, Pierre (2007) [1990], "Catégories tannakiennes", The Grothendieck Festschrift, II, Birkhauser, pp. 111–195, ISBN 9780817645755