William Jones (mathematician)

William Jones
William Jones
	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

William Jones, FRS (1675 – 1 July 1749^[1]) was a Welsh mathematician, most noted 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, he became a Fellow of the Royal Society, and was later its vice-president.^[2]

^ Roberts, Gareth Ffowc (2020). Cyfri'n Cewri. University Press Wales. p. 57. ISBN 978-1786835949.
^ "Library and Archive catalogue". Royal Society. Retrieved 1 November 2010.^{[permanent dead link]}

William Jones
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