![ISOMURA YOSHINORI (d. 1710). Zho Sanpo Ketsugisho. Kyoto: Nakamura Hanbee, Jokyo 1 [1684].](https://www.christies.com/img/LotImages/2007/CKS/2007_CKS_07399_0152_000(021232).jpg?w=1)
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ISOMURA YOSHINORI (d. 1710). Zho Sanpo Ketsugisho. Kyoto: Nakamura Hanbee, Jokyo 1 [1684].
5 volumes, 8° (228 x 147mm). Xylographically printed with about 250 diagrams and illustrations. (Occasional minor stains.) Original blue wrappers with title slips (rubbed and creasemarked, recently restitched), modern cloth case.
A CLASSIC WORK OF JAPANESE MATHEMATICS, third edition, following earlier printings in 1661 and 1674. With new title and much enlarged text, it included the exact digit for \Kp\k, developed the correct method for the calculation of the surface of a sphere, solved mathematical problems connected with the magic square later described by Euler and today known as Sudoku, and achieved 'a rough approach to an integral calculus' (Smith) in the form developed by Leibniz. Isomura was called 'the master of the abacus' and the abacus features in many illustrations as does his interest in 'magic squares, magic circles and magic wheels.' The one recorded copy of this edition outside Japan is in the Swedish Royal Collection; earlier editions are only recorded at Waseda University, Tokyo. Smith History I, p. 437; Smith-Mikami p. 66; not in Kerlen. (5)
5 volumes, 8° (228 x 147mm). Xylographically printed with about 250 diagrams and illustrations. (Occasional minor stains.) Original blue wrappers with title slips (rubbed and creasemarked, recently restitched), modern cloth case.
A CLASSIC WORK OF JAPANESE MATHEMATICS, third edition, following earlier printings in 1661 and 1674. With new title and much enlarged text, it included the exact digit for \Kp\k, developed the correct method for the calculation of the surface of a sphere, solved mathematical problems connected with the magic square later described by Euler and today known as Sudoku, and achieved 'a rough approach to an integral calculus' (Smith) in the form developed by Leibniz. Isomura was called 'the master of the abacus' and the abacus features in many illustrations as does his interest in 'magic squares, magic circles and magic wheels.' The one recorded copy of this edition outside Japan is in the Swedish Royal Collection; earlier editions are only recorded at Waseda University, Tokyo. Smith History I, p. 437; Smith-Mikami p. 66; not in Kerlen. (5)
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