The first mathematician to use the Greek letter π to represent the ratio of a circle's circumference to its diameter was William Jones, who used it in his work Synopsis Palmariorum Matheseos; or, a New Introduction to the Mathematics, of 1706.
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William Jones, a Welsh mathematician, first used the pi symbol in 1706.
William Jones first used the pi symbol (π) in 1706
Maurits Escher was a remarkable Swiss mathematician and teacher that was responsible for instituting the use of the symbol pi in mathematical notation.
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