Greek Letter Pi (Πι - Π)


The Semitic form probably had no meaning. The Greek form is used for the circumference of a circle with unit diameter. Why a version of this letter with the right upright rounded became the Roman "P", matching the Greek letter for "R", is anybody's guess.

"Π" Letter in mathematics and in science

Π represents:

  • the product operator in mathematics.
  • a plane

π represents:

  • Archimedes' constant, the ratio of a circle's circumference to its diameter
  • the prime counting function
  • profit in microeconomics and game theory
  • inflation in macroeconomics, expressed as a constant with respect to time
  • the state distribution of a Markov chain
  • a type of covalent bond in Chemistry (Pi bond)
  • a pion (pi meson)

Greek words with "π"

πόλη, πέτρα

See Also:

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