John Machin

John Machin
Född1680[1]
England[2]
Död9 juni 1751[1]
London[3]
BegravdSt Botolph-without-Bishopsgate[4]
kartor
Medborgare iKungariket Storbritannien
SysselsättningMatematiker[2], astronom[5]
ArbetsgivareGresham College (1713–1751)[3]
Utmärkelser
Fellow of the Royal Society
Redigera Wikidata

John Machin, född ca 1686, död 9 juni 1751, var en engelsk astronom och matematiker.

Machin var professor i astronomi vid Gresham College i London och blev känd för sin metod att beräkna talet pi (π) med den nu berömda formeln (Machins formel)

kombinerad med Taylorserien för arctan. Med hjälp av denna formel blev Machin den förste att 1706 beräkna π med 100 decimaler. Senare lyckades 1800-talets matematiker beräkna π med hundratals decimaler för hand.

Källor

Noter

  1. ^ [a b] MacTutor History of Mathematics archive, läst: 22 augusti 2017.[källa från Wikidata]
  2. ^ [a b] Arthur Berry, A Short History of Astronomy, John Murray, 1898.[källa från Wikidata]
  3. ^ [a b] MacTutor History of Mathematics archive.[källa från Wikidata]
  4. ^ Find a Grave, läs online.[källa från Wikidata]
  5. ^ Gemeinsame Normdatei, läst: 26 juni 2015.[källa från Wikidata]
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