Kurushima Kinai (久留島喜内?, d. 1757),[1] also known as Kurushima Yoshita[2] and Kurushima Yoshihiro (久留島喜内?),[3] was a Japanese mathematician in the Edo period.[4]

The Japanese board game of shogi attracted Kurushima's interest; and he was recognized in his own time as a master player.[5] Among shogi players, he continues today to be well known for seven "puzzle ring" gambits with subsequent sequenced maneuvers -- including the "silver puzzle ring."[6]

In his lifetime, he was recognized among the most prominent intellectuals. His mathematical gift was highly esteemed.[7] Kurushima, like most of his contemporaries, was very interested in the mathematical problems involved in "magic squares."[8]

Selected works

Kurushima's published writings are few.[3]

This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries.

* Kurushima kyokusū (久留島極数?) OCLC 033747221
* Kyūshi ikō. 1 ( 久氏遺稿. 天之卷?) OCLC 033745707
* Kyūshi ikō. 2 ( 久氏遺稿. 地之卷?) OCLC 033746085
* Heihō reiyaku no jutsu ( 平方零約之術?) OCLC 033745451

See also

* Sangaku, the custom of presenting mathematical problems, carved in wood tablets, to the public in shinto shrines
* Soroban, a Japanese abacus
* Japanese mathematics (wasan)

Notes

1. ^ 久留島喜内 -- Chiba University, Dept. of Mathematics and Infomatics
2. ^ List of Japanese mathematicians -- Clark University, Dept. of Mathematics and Computer Science
3. ^ a b WorldCat Identities: 久留島義太 -1757
4. ^ Smith, David. (1914). A History of Japanese Mathematics, p. 176. at Google Books
5. ^ Shogi, "Famous Mate Problems" -- #62, #63, #68, #69, #79
6. ^ La Revue de l'Association Française de Shogi, Juillet 1998, Numéro 19, p. 4.
7. ^ Smith, p. 166. at Google Books
8. ^ Michiwaka, Yoshimasa. (1997). "Magic Squares in Japanese Mathematics," Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures, p. 539. at Google Books

References

* Endō Toshisada (1896). History of mathematics in Japan (日本數學史史 , Dai Nihon sūgakush?). Tōkyō: _____. OCLC 122770600
* Selin, Helaine. (1997). Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures. Dordrecht: Kluwer/Springer. 10-ISBN 0792340663/13-ISBN 9780792340669; OCLC 186451909
* David Eugene Smith and Yoshio Mikami. (1914). A History of Japanese Mathematics. Chicago: Open Court Publishing. OCLC 1515528 -- note alternate online, full-text copy at archive.org

External links

* Shogi, Kuroshima's "Silver Puzzle Ring" gambit