Talk:Ajima Naonobu

Calculus?
I cannot find any other sources, except the single book listed, that implies this mathematician introduced calculus to Japan. Could this be a reliable source? I feel that is hugely important, yet it doesn't seem to have any support, apart from one text from the 1940. Zagadka314 (talk) 10:41, 25 July 2015 (UTC)

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