Ajima Naonobu (安島直円?, 1732 – 1798), also known as Ajima Chokuyen, was a Japanese mathematician of the Edo period.
Ajima is credited with introducing calculus into Japanese mathematics. This significance of this innovaction is not diminished by a likelihood that he had access to European writings on the subject.
Ajima was an astronomer at the Shogun's Observatory (Bakufu Temmongaki).
In 1976, the International Astronomical Union (IAU) honored Ajima by identifying a crater on the moon with his name. Naonobu is a small lunar impact crater located on the eastern Mare Fecunditatis, to the northwest of the prominent crater Langrenus.
Ajima's published writings encompass 28 works in 33 publications in 2 languages and 45 library holdings.
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.
* Ajima Naonobu zenshū (安島直円全集?) "017232052" OCLC 017232052, collected works
* Sanpō kosō (算法考艸?) OCLC 22057185881, algorithms considered
* Jujireki bimmo (Introduction of the 'Works and Days Calendar')
* Anshi seiyo-reki koso (Ajima's Studies for Western Calendars)
* Ajima sensei bimmo do jutsu (Methods of Professor Ajima's 'bimmo' )
* Koshoku mokyu zokkai (Introduction of Eclipses of the Sun and the Moon)
* Sansha San'en Jutsu (Methods of Three Diagonals and Three Circles)
* Sangaku, the custom of presenting mathematical problems, carved in wood tablets, to the public in shinto shrines
* Soroban, a Japanese abacus
* Japanese mathematics (wasan)
1. ^ Smith, David. (1914). A History of Japanese Mathematics, pp. 195-205. at Google Books
2. ^ Restivo, Sal P. (1992). Mathematics in Society and History: Sociological Inquiries, p. 58. at Google Books
3. ^ a b c d Jochi, Shigeru. (1997). "Ajima Naonobu," Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures, p. 38. at Google Books
4. ^ United States Geological Survey: Planetary names, Naonobu; Naonobu lunar crater (in Japanese)
5. ^ WorldCat Identities: 安島直円 1739-1798
6. ^ Jochi, pp. 38-39. at Google Books
7. ^ Jochi, p. 39. at Google Books
* Endō Toshisada (1896). History of mathematics in Japan (日本數學史史 , Dai Nihon sūgakush?). Tōkyō: _____. OCLC 122770600
* Oya, Shin'ichi. (1970). "Ajima Naonobu" in Dictionary of Scientific Biography, Vol. 1. New York: Charles Scribner's Sons. 10-ISBN 0684101149
* Restivo, Sal P. (1992). Mathematics in Society and History: Sociological Inquiries. Dordrecht: Kluwer Academic Publishers. 10-ISBN 0792317653/13-ISBN 9780792317654; OCLC 25709270
* 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
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