Arima Yoriyuki

Arima Yoriyuki

Arima Yoriyuki ( _ja. 有馬 頼徸; December 31, 1714December 16, 1783) was a Japanese mathematician of the Edo era. He was the lord of Kurume Domain and approximated the value of pi and its square, pi^2. In 1766, he found the following rational approximation of pi, correct to 29 digits: [cite web
title = Collection of approximations for pi
url = http://numbers.computation.free.fr/Constants/Pi/piApprox.html
format =
accessdate = 2008-04-04
] [cite book
last = Hardy
first = G. H.
coauthors = E. M. Wright
title = An Introduction to the Theory of Numbers
publisher = Oxford Science Publications
year = 1978
]

:piapproxfrac{428224593349304}{136308121570117}=3.14159265358979323846264338327(569...)

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