Leonard Euler
Math teacher, mathematition. It all depends really. Accountants, secretaries, Lawyers sometimes. It's all very diverse.
Leonhard Euler used the symbol pi in 1737.
Mathematician Rudolph Swetchefriz{Added} The symbol is not "for" pi but is pi - one of the letters of the Greek alphabet.
Maurits Escher was a remarkable Swiss mathematician and teacher that was responsible for instituting the use of the symbol pi in mathematical notation.
euler, Fredrick
Leonhard Euler.
Leonhard Euler.
Leonhard Euler.
It was the mathematician William Jones who first used pi as a mathematical symbol in 1706
Leonard Euler
Pope Gregory XIII in 1582.
LEONHARD EULER was his name and Pi was his game... he was one of the best mathematicians of all time!