Pi (Π π) is the 16th letter of the Greek alphabet and has a numeric value of 80. The upper-case letter Π is used as a symbol for: In mathematics, the product operation. In textual criticism, Codex Petropolitanus, a 9th century, uncial codex of the Gospels, now located in St. Petersburg, Russia. The lower-case letter π is used as a symbol for: In economics, profit. In mathematics, the constant pi, which is the ratio of the circumference to the diameter of a circle. In number theory, the function π(x) is the number of primes that are less than or equal to x. In particle physics, π0, π+ and π- are three forms of pi meson. See also Pi (movie)
The upper-case letter Π is used as a symbol for:
The lower-case letter π is used as a symbol for:
See also Pi (movie)