Pi (disambiguation)

Pi (math), , or π, is the mathematical constant equal to a circle's circumference divided by its diameter.

Pi may also refer to:

Letter Pi (π)
Lower-case π
  • Pi (letter), the Greek letter
  • Lowercase π:
    • π (film), a 1998 film directed by Darren Aronofsky
    • (pi function), the prime-counting function
    • Pi bond
    • Osmotic pressure
    • A song from the Kate Bush album Aerial
    • Shorthand for pion
    • A men's fragrance from Givenchy
    • The symbol for political life used in Boethius' Consolation of Philosophy
  • Uppercase Π:
    • The product symbol
    • (Pi function), the Gamma function when offset to coincide with the factorial
      • , the reciprocal of the Pi function

Pi as a word
  • Pi (instrument)
  • Pi (.hack), a fictional character from the multimedia franchise .hack//G.U.
  • Pi Magazine
  • Pi Recordings, a record label
  • "Pi", a song from the Hard 'n Phirm album Horses and Grasses; the song ends at 3:14
  • Pi, a member of Team Robo in Sega Soccer Slam
  • Pi, a fictional character in the novel Life of Pi
  • Pi County, county in Sichuan, China
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