William Jones (mathematician)
William Jones | |
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Portrait of William Jones by William Hogarth, 1740 National Portrait Gallery | |
| Born | 1675 Llanfihangel Tre'r Beirdd, Isle of Anglesey |
| Died | 3 July 1749 (aged 73–74) London, England |
| Children | Sir William Jones |
| Part of a series of articles on the |
| mathematical constant π |
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| 3.1415926535897932384626433... |
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William Jones, FRS (1675 – 1 July 1749) was a Welsh mathematician best known for his use of the symbol π (the Greek letter Pi) to represent the ratio of the circumference of a circle to its diameter. He was a close friend of Sir Isaac Newton and Sir Edmund Halley. In November 1711, Jones became a fellow of the Royal Society, and later served as the Royal Society's vice-president.