安岛直圆

安岛直圆（；），字伯規，号南山，日本江户时代中期的財政家、数学家。新庄藩藩士。他精通和算，與關孝和並稱「和算二大焦點」。他的贡献包括有关对数的研究和对《线上累圆术》的归纳法的改进。Beasley 1999;Hall 1970;Hane 1991;Totman 1981;Mason and Caiger 1997Deal,William E.（2007）. Handbook to Life in Medieval and Early Modern Japan.Oxford University Press,USA.ISBN 9780195331264.

 参考 

扩展阅读
 Endō Toshisada (1896). . Tōkyō: _____.  OCLC 122770600 
 Oya, Shin'ichi. (1970). "Ajima Naonobu" in Dictionary of Scientific Biography, Vol. 1. New York: Charles Scribner's Sons. ISBN 0-684-10114-9
 Restivo, Sal P. (1992).  Mathematics in Society and History: Sociological Inquiries.  Dordrecht: Kluwer Academic Publishers. ISBN 0-7923-1765-3/ISBN 978-0-7923-1765-4;   OCLC 25709270 
 Selin, Helaine. (1997).   Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures.  Dordrecht: Kluwer/Springer. ISBN 0-7923-4066-3/ISBN 978-0-7923-4066-9;   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

Category:安島氏
Category:江戶時代學者
Category:18世纪日本数学家
Category:新庄藩人物 (出羽國)
Category:武藏國出身人物
Category:從五位受位者