Kōichirō Harada

Kōichirō Harada ( Japanese 原田 耕 一郎 , Harada Kōichirō ; * 1941 in Japan ) is a Japanese mathematician who mainly deals with finite groups .

Harada came to the USA in 1968, where he was at the Institute for Advanced Study until 1970 . In 1972 he received his doctorate from the University of Tokyo . He has been at Ohio State University since 1971 , where he became a professor and stayed for the remainder of his career.

Harada, in collaboration with Daniel Gorenstein, played an important role in the classification program of finite simple groups in the early 1970s when Gorenstein devised a strategy for such a program. The first fruit of this collaboration was a monograph published in 1974.

A sporadic group is named after him and Simon Norton , a subgroup of the monster group they both studied, Harada 1973 in Cambridge (and Norton as well). Both published about it in 1975. Harada also dealt with vertex operator algebras , which were used by Igor Frenkel , James Lepowsky , Arne Meurman for representations of the monster group, which explained previously discovered relationships of the moonlight properties of modular shapes to the monster group.

In 2000 he received the Algebra Prize ( daisūgaku-shō ) of the Japanese Mathematical Society (as the seventh prize winner).

Web links

• Homepage
• Portrait of Harada on the occasion of the Algebra Prize of the Japanese Mathematical Society
• Nihon Sūgakukai (Japanese Mathematical Society), Algebra Prize Winner: 原田 耕 一郎 氏 の 業績

Fonts

• with Daniel Gorenstein : Finite simple groups whose 2-subgroups are generated by at least 4 elements . Memoirs AMS 1974
• On the simple group F of order 2 ¹⁴ 3 ⁶ 5 ⁶ 7 11 19 . Proc. Group Theory Conference in Park City, Utah, 1975, pp. 119-276
• Some elliptic curves arising from the Leech lattice . Journal of Algebra, Vol. 125, 1989, pp. 289-310
• Monster . Iwanami Publishing, 1999, Japanese (book about the monster group )