Translingual

Symbol

Π

1. (mathematics) Product over a set of like terms:

   

2. (mathematics, logic, computer science) A class (in some hierarchy of formulae, like the arithmetical hierarchy or polynomial hierarchy) of those formulae whose outermost quantifiers are universal quantifiers.

Usage notes

• (mathematics): Though there exists a distinct code point (∏) for the purpose of the mathematical product, the upper case pi here continues to be used for convenience.

See also

• Σ
• Π on Wikipedia.Wikipedia

Greek

Letter

Π • ‎(P) ‎(uppercase, lowercase π)

1. The upper case letter pi (πι), the 16th letter of the modern Greek alphabet.

See also

• Greek alphabet: Αα Ββ Γγ Δδ Εε Ζζ Ηη Θθ Ιι℩ Κκ Λλ Μμ Νν Ξξ Οο Ππ Ρρ Σσς Ττ Υυ Φφ Χχ Ψψ Ωω

Translingual

This mosaic is outside the mathematics building at the Technische Universität Berlin.

When a circle's diameter is 1 unit, its circumference is π units.

When a circle's radius is 1 unit, its circumference is 2π units.

Symbol

π

1. (mathematics) An irrational constant representing the ratio of the circumference of a circle to its diameter; approximately 3.14159265.
2. (particle physics) pion, pi meson
3. (mathematics) homotopy group

See also

• π on Wikipedia.Wikipedia

Greek

Letter

π • ‎(p) ‎(lowercase, uppercase Π)

1. The lower case letter pi (πι), the 16th letter of the modern Greek alphabet.

Numeral

π'

1. The number 80 in Greek numerals.

,π

1. The number 80,000 in Greek numerals.
2. (The Greek letter pi.)

See also

see: Appendix:Greek alphabet