The Greek letter π was adopted for the number from the Greek word for perimeter "περίμετρος", first by William James, in 1707, and popularized by LeonhardEuler in 1737. The Greek letter π was adopted for the number from the Greek word for perimeter"περίμετρος", first by William James, in 1707, and popularized by LeonhardEuler in 1737.
It was the mathematician William Jones who first used pi as a mathematical symbol 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.
Euler
The symbol you are referring to is likely the "caret" symbol, which is commonly used to indicate exponentiation in mathematical expressions. It is not a standard mathematical notation for representing the number Pi.
Mathematician Rudolph Swetchefriz{Added} The symbol is not "for" pi but is pi - one of the letters of the Greek alphabet.
Lindemann
Mr. Euler
Leonhard Euler.
Leonard Euler
Pi is a letter in the Greek alphabet. Greek letters are used for many mathematical quantities, especially variables in formulas, such as theta for an angular measurement, and of course pi for the ratio of the diameter to the circumference of a circle. Pi notation was first used by the English mathematician William Jones in 1706. The pi notation was used by Euler as early as 1737. Thereafter, pi became the standard notation for this all-important ratio and transcendental constant.
The symbol for pi is the 16th letter of the Greek alphabet. Many Greek letters are used in mathematics for various functions.
Pi was first used as a mathematical symbol by the mathematician William Jones in 1706.