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| {{Japanese name|Arima}}
| | Music Teacher (Personal Tuition ) Titus from Haliburton, likes go kart racing, diet and wood working. Has signed up for a global contiki trip. Is very excited specifically about taking a trip to Kromdraai. |
| {{nihongo|'''Arima Yoriyuki'''|有馬 頼徸||December 31, 1714 – December 16, 1783}} was a [[Japan]]ese [[mathematician]] of the [[Edo period]]. He was the lord of [[Kurume Domain]] and approximated the value of <math>\pi</math> and its [[square (algebra)|square]], <math>\pi^2</math>. In 1766, he found the following rational approximation of pi, correct to 29 digits:<ref>{{cite web| title = Collection of approximations for <math>\pi</math>| url = http://numbers.computation.free.fr/Constants/Pi/piApprox.html| accessdate = 2008-04-04}}</ref><ref>
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| {{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}}</ref>
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| :<math>\pi\approx\frac{428224593349304}{136308121570117}=3.14159265358979323846264338327(569...)</math>
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| ==References==
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| {{reflist}}
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| {{Persondata
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| | NAME = Arima Yoriyuki
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| | ALTERNATIVE NAMES =
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| | SHORT DESCRIPTION = Daimyo
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| | DATE OF BIRTH = December 31, 1714
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| | PLACE OF BIRTH =
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| | DATE OF DEATH = December 16, 1783
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| | PLACE OF DEATH =
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| }}
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| {{DEFAULTSORT:Arima, Yoriyuki}}
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| [[Category:1714 births]]
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| [[Category:1783 deaths]]
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| [[Category:Japanese mathematicians]]
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| [[Category:18th-century mathematicians]]
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| [[Category:Daimyo]]
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| {{Japan-scientist-stub}}
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| {{Asia-mathematician-stub}}
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Latest revision as of 23:52, 21 November 2014
Music Teacher (Personal Tuition ) Titus from Haliburton, likes go kart racing, diet and wood working. Has signed up for a global contiki trip. Is very excited specifically about taking a trip to Kromdraai.