The Yoriyuki Arima reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Yoriyuki Arima

Yoriyuki Arima (November 25, 1714 - November 23, 1783) was a Japanese mathematician of the Edo era. He was the lord of Kurume domain and approximated the value of pi and the square of pi.

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