円周率をπと名称を付けたのは誰
William Jones, FRS (1675 – 3 July 1749) was a Welsh mathematician, most noted for his use of the symbol (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.
William Jones