Sōichi Kakeya

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Sōichi Kakeya
Born (1886-01-18)18 January 1886
Fukayasu, Japan
Died 9 January 1947(1947-01-09) (aged 60)
Nationality  Japan
Alma mater Imperial University of Tokyo
Known for Kakeya set
Kakeya conjecture
Eneström-Kakeya theorem[1]
Scientific career
Fields Mathematics
Institutions Imperial University of Tokyo
Tokyo Bunri University
Institute of Statistical Mathematics

Sōichi Kakeya (掛谷 宗一, Kakeya Sōichi, January 18, 1886 – January 9, 1947) was a Japanese mathematician who worked mainly in mathematical analysis and who posed the Kakeya problem and solved a version of the transportation problem.[2][3] He received the Imperial Prize of the Japan Academy in 1928, and was elected to the Japan Academy in 1934.[4]


  1. ^ Robert Bentley Gardner (1997) "Some generalizations of the Eneström-Kakeya Theorem", Acta Mathematica Hungarica 74(1–2):125–34. doi:10.1007/BF02697881
  2. ^ Tanaka, George. "The Transportation Problem by Prof. Kakeya" (PDF). 
  3. ^ Kakeya, Soichi (1917), "Some problems on maximum and minimum regarding ovals", Tohoku science reports, 6: 71–88 
  4. ^ "The Japan Academy, Deceased Members: K, L". 
  • Kakeya, S. (1912-13) "On the Limits of the Roots of an Algebraic Equation with Positive Coefficients," Tohoku Mathematical Journal (First Series),2:140–142.