"Kanshin Kosanpen" - Kanshin Kosanpen

Japanese: 《観新考算変》 - かんしんこうさんぺん
"Kanshin Kosanpen" - Kanshin Kosanpen

...As a means of solving the problem, Ajima Choen summarized it into a neat formula using common tangents, and Hodoji's Sanhen method was developed to make calculations easier by applying a method equivalent to today's inversion method. He compiled this in a book called Kanshinko Sanhen, which he left in the homes of Japanese mathematicians all over the country. Sanhen was created based on inspiration from Hasegawa Hiroshi's Henkeijutsu and Kyokukeijutsu. ...

From 【Wasan】

...His students included Kenmochi Shoko (1790-1871), Hodoji Zen (1820-68), Kawakita Chorin (1840-1919), and many other mathematicians. Hodoji called himself Kanzan, and he wrote Kanshinko Sanpen (Sanpen Method) in various places, claiming that it was a new method he had discovered. Sanpen method corresponds to today's inversion method. ...

*Some of the terminology explanations that refer to "Kanshin Kosanhen" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…解決法の手段として,共通接線を使ってきれいな公式にまとめたのが安島直円で,この安島の方法を,今日の反転法に相当する方法を適用して,簡単に計算できるようにしたのが法道寺の算変法である。彼はこれを《観新考算変》という書にまとめて,各地の和算家の家に書き残している。算変法は,長谷川寛の変形術や極形術にヒントを得て作られた方法である。…

【和算】より

…弟子には剣持章行(1790‐1871),法道寺善(ほうどうじぜん)(1820‐68),川北朝鄰(1840‐1919),その他多数の数学者がいた。法道寺は観山と号し,その観山が新しく見つけた方法であるとして,《観新考算変(かんしんこうさんぺん)》を各地に書き残している。算変法は今日の反転法に相当する。…

※「《観新考算変》」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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